Only the gospel of Christ fully knows the mystery of sin and the problem of sin and everything which hides within it. The prodigal son of the Gospel is the perfect example of the repentant sinner. The Gospel shows us that man, through his free will, can share his life with Earth and with Heaven, with Satan and with God, with paradise and with hell. Sin gradually strips man of everything divine in him, paralyzes his every divine inclination and desire, until it finally throws him into the bosom of Satan. And then man reaches the plight of grazing the swine of his master, the Devil. The swine are passions, which are always greedy and gluttonous. In such a life, the unfortunate man is nothing more than insane. In a shocking parable of the Gospel, the Lord says about the prodigal son, ‘he came to himself,’ (Luke 15:17) How did he come to himself? He came to himself through repentance. Through sin, man becomes mad, insane. Every sin, even the most seemingly insignificant one, is always an insanity of the soul. Through repentance, man comes to his senses becomes complete again, comes to himself. Then he cries out loud to God, runs to Him, and cries towards Heaven, ‘Father, I have sinned against Heaven, and in thy sight’ (Luke 15:21). And what is the heavenly Father doing? He is always infinitely merciful upon seeing His child in a state of repentance. He has compassion for him, runs, embraces him, and kisses him. He orders His heavenly hosts, the holy angels: ‘Bring forth the best robe and put it on him; and put a ring on his hand, and shoes on his feet: and bring hither the fatted calf, and kill it; and let us eat, and be merry: for this is My son who was dead, and is alive again; and he was lost, and is found. And they began to be merry.’ (Luke 16:22-24) And this is taking place for each and every one of us, and for the sake of every sinner who repents. Namely, joy and happiness is taking place in the heaven of the All-merciful Lord and God, and together with Him, all of the holy angels.

St. Justin Martyr

He who will not accept a reproof, just or unjust, renounces his own salvation. But he who accepts it with an effort, or even without an effort, will soon receive the remission of his sins.

St. John Climacus

As the gradual pouring of water on a fire completely extinguishes the flame, so the tears of true mourning [for sinfulness] are able to quench every flame of anger and irritability.

St. John Climacus

My friends, God does not ask or desire that man should mourn from sorrow of heart, but rather that, out of love for Him, he should rejoice with spiritual laughter. Remove the sin, and the tear of sorrow is superfluous for your eyes.

St. John Climacus

A sign of true repentance is the acknowledgment that we deserve all the afflictions, visible and invisible, that come upon us, and even greater ones.

St. John Climacus

Do not be surprised that you fall every day; do not give up, but stand your ground courageously. And assuredly, the angel who guards you will honour your patience. While a wound is still fresh and warm, it is easy to heal…

St. John Climacus

It is impossible for us who have fallen into the pit of iniquities ever to be drawn out of it, unless we sink into the abyss of the humility of the repentant.

St. John Climacus

But nothing causes such exceeding grief as when anyone, lying under the captivity of sin, calls to mind from where he has fallen, because he turned aside to carnal and earthly things, instead of directing his mind in the beautiful ways of the knowledge of God. So you find Adam concealing himself, when he knew that God was present and wishing to be hidden when called by God with that voice which wounded the soul of him yourself? Why are you concealed? Why do you avoid Him Whom you once longed to see? A guilty conscience is so burdensome that it punishes itself without a judge, and wishes for covering, and yet is bare before God.

St. Ambrose of Milan

In going to church, think that you art going to the house of the King of Heaven, where with fear and joy one ought to stand as in heaven before the King of Heaven. While standing in church, do not look around to the sides and do not look at how someone is standing and praying, lest you be condemned with the Pharisee, since you did not come to judge others, but to ask for mercy for yourself from God the Judge and Knower of hearts. Gaze with compunction toward the altar alone, where the holy sacrifice is offered. More than anything else, beware of laughter and conversations, for whoever laughs or converses while standing in church does not render honor to the holy place and tempts others and prevents others from praying.

St. Tikhon of Zadonsk

A penitent is an undisgraced convict. Repentance is reconciliation with the Lord by the practice of good deeds contrary to the sins.

St. John Climacus

You came into the world to save sinners; therefore You came to save Me also? You came to find and to save him who was lost; therefore You came to seek me too, for I am one of the lost. O Lord, O my God and Creator! I should have come to You as a transgressor of Your law. I should have fallen at Your feet, cast myself down before You, humbly begging forgiveness, pleading with You and craving Your mercy. But You Yourself have come to me, wretched and good-for-nothing servant that I am; my Lord has come to me, His enemy and apostate; my Master has come and has bestowed his love of mankind upon me. Listen my soul: God has come to us.

St. Tikhon of Zadonsk

Sinful thoughts continually disturb a man. But if he does not cooperate with them, then he is not guilty of them. 

St. Ambrose of Optina

Repentance is the renewal of baptism. Repentance is a contract with God for a second life. 

St. John Climacus

Sinners that repent are still saved; both publicans and fornicators cleansed by repentance enter into the Kingdom of Heaven.

St. Tikhon of Zadonsk

If we neglect to repent, without any doubt, we will remain outside of the door.  Good deeds, natural in feeling, will in no way replace repentance.

St. Ignatius Brianchaninov

If we have not committed the sins that others have, perhaps this is because we did not have the opportunity – the situation and circumstances were different. In each person there is something good and something bad; we usually see only the vices in people and we see nothing that is good.

St. Ambrose of Optina

Can you place your hope in the world? Whom has it not deceived? To whom has it not lied? It promises much, but gives very little. Only those who hope in the Lord, according to the words of the Prophet David, do not sin, i.e., they are not deceived in their hope!

St. Ambrose of Optina

...let us hold fast to love of Him, hating and rightly turning away from the devil. For as our Benefactor is loved and cherished in proportion to His benefactions, so the wicked one should be hated and rejected for his ways in equal proportion. For he is the destroyer of our life. In the words of the Master, he is a murderer from the beginning [John 8:44]. He is the one who has divided our race into ten thousand opinions, wounding it with many darts of sin and seeking to swallow down the inhabited world. If we do not hate him, there will be no escaping the punishment that will be meted out to us, because we joined to our foe and murderer. But, my brothers, let us fly from him! Let us fly most certainly. What is flight? The avoidance of wicked actions and thoughts, and also affinity with God, the assumption of good works.

St. Theodore the Studite

By resolving to make one's confession, the soul is thereby held from sinning as by a bridle. For what we do not confess, that we do fearlessly as though in the dark.

St. John Climacus

Only the foolish think that suffering is evil. A sensible man knows that suffering is not evil but only the manifestation of evil and healing from evil. Only sin in a man is a real evil, and there is no evil outside sin. Everything else that men generally call evil is not, but is a bitter medicine to heal from evil. The sicker the man, the more bitter the medicine that the doctor prescribes for him. At times, even, it seems to a sick man that the medicine is worse and more bitter than the sickness itself! And so it seems at times to the sinner: the suffering is harder and more bitter than the sin committed. But this is only an illusion – a very strong self-delusion. There is no suffering in the world that could be anywhere near as hard and destructive as sin is. All the suffering borne by men and nations is none other than the abundant healing that eternal Mercy offers to men and nations to save them from eternal death. Every sin, however small, would inevitably bring death if Mercy were not to allow suffering in order to sober men up from the inebriation of sin; for the healing that comes through suffering is brought about by the grace-filled power of the Holy and Life-giving Spirit. 

Blessed is the man who uses his sufferings, knowing that all suffering in this brief life is loosed on men by God in His love for mankind, for the benefit and assistance of men. In His mercy, God looses suffering on men because of their sins – by His mercy and not His justice. For, if it were by His justice, every sin would inevitably bring death, as the Apostle says: “Sin, when it is finished, bringeth forth death” (James 1: 15). In place of death, God gives healing through suffering. Suffering is God’s way of healing the soul of its sinful leprosy and its death.

St. Nikolai Velimirovich