I have seen impure souls crazed for physical love; but when these same souls have made this grounds for repentance, as a result of their experience of sexual love they have transferred the same eros to the Lord, They have immediately gone beyond all fear and been spurred to insatiable love for God. This is why the Lord said to the chaste harlot not that she had feared, but that she had loved much, and was readily able to repel eros through eros.
Do not imagine that you will overwhelm the demon of fornication by entering into an argument with him. Nature is on his side and he has the best of the argument. So the man who decides to struggle against his flesh and to overcome it by his own efforts is fight in vain. The truth is that unless the Lord overturns the house of the flesh and builds the house of the soul, the man wishing to overcome it has watched and fasted for nothing. Offer up to the Lord the weakness of your nature. Admit you incapacity and, without your knowing it, you will win for yourself the gift of chastity.
Let them take courage who are humbled by their passions. For even if they fall into every pit and are caught in every snare, when they attain health they will become healers, luminaries, beacons and guides to all, teaching about the forms of every sickness and through their own experience saving those who are about to fall.