How to Overcome Lust and Grow in Purity

1. What Is Lust?

Lust is the disordered desire for sexual pleasure. The Catechism defines it in two sentences: "Lust is disordered desire for or inordinate enjoyment of sexual pleasure. Sexual pleasure is morally disordered when sought for itself, isolated from its procreative and unitive purposes" (CCC 2351). It is one of the seven capital sins (CCC 1866), which means it is a root that produces many other sins.

Start here, because it matters for everything that follows: your sexuality is good. God made it. The Catechism says that sexuality "affects all aspects of the human person in the unity of his body and soul," including "the capacity to love" and "the aptitude for forming bonds of communion with others" (CCC 2332). Attraction is part of being human. Lust is what happens when that good desire is cut loose from love and turned toward using a person, or an image of a person, for pleasure.

St. John names three kinds of disordered desire: "the lust of the flesh and the lust of the eyes and the pride of life" (1 John 2:16). The Church's tradition gives the ninth commandment to the first of these: "the ninth commandment forbids carnal concupiscence" (CCC 2514). And Jesus took the commandment against adultery all the way into the heart: "every one who looks at a woman lustfully has already committed adultery with her in his heart" (Matthew 5:28, quoted in CCC 2336).

If you are reading this because lust has a grip on you, please hear this first. You are not the only one, and you are not beyond help. Some of the greatest saints in the Church fought this exact battle for years before they knew freedom.

2. Is a Lustful Thought a Sin?

A lustful thought that comes to you uninvited is a temptation, and temptation by itself is no sin. The sin begins when you choose to welcome it, keep it, and enjoy it. The Catechism asks us to "discern between being tempted and consenting to temptation" (CCC 2847). Jesus himself was tempted (Matthew 4:1-11), and he was without sin.

The Church calls the inner pull toward sin concupiscence, a wound left by original sin. The Catechism is gentle and clear about it: concupiscence "unsettles man's moral faculties and, without being in itself an offense, inclines man to commit sins" (CCC 2515). So the flash of a thought, the sudden image in your memory, the attraction you did not ask for: these are the battlefield. What you do next is the battle.

The practical test is consent. Did you notice the thought and turn away, perhaps clumsily, perhaps after a few seconds? Then you resisted, and that resistance pleases God. Did you deliberately dwell on it, build on it, and go looking for more? Then you consented. The Catechism describes purity of heart as including "discipline of feelings and imagination" and "refusing all complicity in impure thoughts" (CCC 2520).

When is lust a mortal sin?

Lust in its full sense touches grave matter, because it concerns the sixth and ninth commandments. For a sin to be mortal, though, it must also be committed "with full knowledge and deliberate consent" (CCC 1857). Habit, fear, anxiety and other factors can reduce responsibility (CCC 1735). If you are unsure whether something was mortal, bring it to confession and ask. If you tend to panic over every passing thought, tell your confessor that too. Scrupulosity is its own kind of suffering, and a good priest can help you carry it.

3. Why Lust Matters, Spiritually and Humanly

Lust matters because it slowly trains us to see people as objects, and that habit damages our ability to love. The Church describes chastity as "the integrity of the person": a chaste person "tolerates neither a double life nor duplicity in speech" (CCC 2337-2338). Lust does the opposite. It splits a person in two: the face shown in public and the life lived in secret.

The Catechism puts the choice plainly: "either man governs his passions and finds peace, or he lets himself be dominated by them and becomes unhappy" (CCC 2339). Many people who struggle with lust will recognise that unhappiness. There is the restlessness, the shame after, the sense that the desire is never satisfied for long, the distance it puts between you and the people you love, and the distance it puts between you and God in prayer.

St. Thomas Aquinas, following St. Gregory the Great, listed the "daughters" of lust, the further harms it brings: "blindness of mind, thoughtlessness, inconstancy, rashness, self-love, hatred of God, love of this world and abhorrence or despair of a future world" (Summa Theologiae II-II, q. 153, a. 5). Read that list slowly. Lust clouds judgment, makes us impulsive, turns us in on ourselves, and finally makes heaven seem unreal.

Purity does the reverse. "Purity of heart is the precondition of the vision of God. Even now it enables us to see according to God, to accept others as 'neighbors'" (CCC 2519). The same paragraph says purity lets us see the human body, our own and our neighbor's, as "a temple of the Holy Spirit, a manifestation of divine beauty." St. John Paul II spent years of Wednesday audiences on this, now called the Theology of the Body, showing that the body has a "spousal meaning": it is made for self-giving love. Lust grasps. Love gives. (See St. John Paul II.)

4. What Is Chastity, and Who Is Called to It?

Chastity is the virtue that overcomes lust. The Catechism defines it as "the successful integration of sexuality within the person and thus the inner unity of man in his bodily and spiritual being" (CCC 2337). Chastity is a yes before it is a no. It is the freedom to love a person as a person.

Every Christian is called to chastity: "All the baptized are called to chastity" (CCC 2348). It looks different according to your state in life. "Married people are called to live conjugal chastity; others practice chastity in continence" (CCC 2349). Single people, engaged couples, priests, religious, widows and married couples are all invited into the same virtue, lived in a different way.

Three truths from the Catechism make chastity sound far more hopeful than most people expect:

• It is a gift as well as an effort. "Chastity is a moral virtue. It is also a gift from God, a grace, a fruit of spiritual effort" (CCC 2345). You can ask for it.
• It is ordered to love. "Self-mastery is ordered to the gift of self" (CCC 2346). You master yourself so that you have a self to give.
• It grows in friendship. "The virtue of chastity blossoms in friendship" (CCC 2347). Chaste people tend to have deeper friendships, because people feel safe with them.

Lust also drives several specific sins that each have their own guide in this series: pornography, masturbation, sex before marriage, and adultery and emotional affairs. If one of those is your particular fight, start there after this page.

5. How to Overcome Lust: Practical Steps

The Catechism lists the means for anyone who wants to resist temptation: "self-knowledge, practice of an ascesis adapted to the situations that confront him, obedience to God's commandments, exercise of the moral virtues, and fidelity to prayer" (CCC 2340). Here is what that looks like on an ordinary Tuesday.

1. Know your triggers. Self-knowledge comes first. When do you fall? Late at night, alone, tired, bored, lonely, stressed, after an argument? Write the pattern down. Most battles are lost hours before the moment of temptation.
2. Guard your eyes. The Catechism names "purity of vision, external and internal" (CCC 2520). Job made "a covenant with my eyes" (Job 31:1). In practice: look away quickly, without a second glance. Unfollow accounts that feed the fire. Skip the series with the scenes you know are coming.
3. Remove the near occasions. Phones out of the bedroom. Filters and accountability software on every device. No screens alone after a set hour. If a particular relationship keeps leading you toward sin, put distance there. These steps can feel extreme until you see how much easier the battle becomes.
4. Take care of your body. Sleep, exercise, real meals, and time outdoors make temptation weaker. Chastity "comes under the cardinal virtue of temperance" (CCC 2341), and temperance in food, drink and screens supports it.
5. Fill your mind with good things. "Whatever is pure, whatever is lovely ... think about these things" (Philippians 4:8, quoted in CCC 1803). An empty mind is an open door. Read, pray, make something, call a friend.
6. Pray the moment you are tempted. A short prayer is enough: "Jesus, help me." "Mary, Mother most pure, pray for me." Then get up and change your situation. Leave the room, take a walk, put the phone in another room.
7. Examine your conscience every night. Two minutes. Where did grace win today? Where did you slip? Thank God for the first and ask forgiveness for the second.
8. Go to confession often. Monthly at least, and promptly after a fall. Use the same confessor if you can. Regular confession "helps us form our conscience, fight against evil tendencies, let ourselves be healed by Christ" (CCC 1458). See our guide to confession.
9. Receive the Eucharist worthily and often. The Body of Christ received in a state of grace is the strongest medicine there is against concupiscence.
10. Tell someone. A priest, a spiritual director, a trusted friend of the same sex. Lust feeds on secrecy, and one honest conversation can break its hold.

6. Prayers and Saints for Purity

The saints are proof that this fight can be won. Several are especially close to anyone struggling with lust.

• St. Augustine spent his youth chasing pleasure and famously prayed, "Give me chastity and continence, but not yet" (Confessions VIII.7.17). The Catechism quotes his later discovery: "I thought that continence arose from one's own powers, which I did not recognize in myself ... no one can be continent unless you grant it" (CCC 2520). He became a bishop and Doctor of the Church.
• St. Joseph is invoked in his litany as "Joseph most chaste." Men in particular find in him a model of strong, protective, chaste love.
• The Blessed Virgin Mary, Mother most pure. Many Catholics pray three Hail Marys every night for the grace of purity.
• St. Agnes, martyred in Rome as a young girl, is one of the Church's great witnesses to purity.
• St. Thomas Aquinas is patron of the Angelic Warfare Confraternity, a fellowship run by the Dominican friars for people pursuing chastity together in prayer (angelicwarfareconfraternity.org).
• St. Pier Giorgio Frassati, canonized in 2025, lived a joyful, athletic, friendship-filled purity as a young man in Turin.

7. When You Keep Falling

If you keep falling into lust, you are in the middle of a long fight, and God has not given up on you. The Catechism is honest about how slow this is: "Self-mastery is a long and exacting work. One can never consider it acquired once and for all" (CCC 2342). And: "Chastity has laws of growth which progress through stages marked by imperfection and too often by sin" (CCC 2343). Those words were written for people exactly like you.

Watch out for the voice that says, "You've confessed this a hundred times. Why bother?" That voice wants you to stop going to the one place where grace is waiting. Jesus said to the woman caught in adultery, "Neither do I condemn you; go, and do not sin again" (John 8:11). He said both sentences. Mercy first, then the call to change. He told St. Faustina, "The greater the sinner, the greater the right he has to My mercy" (Diary 723).

Notice your progress, too. Falling once a month after falling every day is real progress. Turning away from a thought after five seconds when it used to take five minutes is real progress. Thank God for it. Then keep going.

If shame has become so heavy that you feel hopeless, read our guide to finding hope when you feel beyond saving.

8. When Lust Has Become a Compulsion

Some people find that lust has become compulsive: they keep acting on it even when they desperately want to stop, it takes more and more to satisfy, and it is damaging their marriage, work or mental health. At that point, prayer and confession remain essential, and you will very likely also need practical help. The Church recognises that "force of acquired habit, conditions of anxiety, or other psychological or social factors" can lessen culpability (CCC 2352), and grace works through good counsellors as well as through the sacraments.

Asking for help takes courage. It is also one of the surest signs that grace is already at work in you.