“I say that this tree has seven branches drooping to the earth, on which grow the flowers and leaves in the way I have told you. These branches are the seven mortal sins which are full of many and diverse wickednesses, contained in the roots and trunk of self-love and of pride, which first made both branches and flowers of many thoughts, the leaves of words, and the fruits of wicked deeds. They stand drooping to the earth because the branches of mortal sin can turn no other way than to the earth, the fragile disordinate substance of the world. Do not marvel, they can turn no way but that in which they can be fed by the earth; for their hunger is insatiable, and the earth is unable to satisfy them. They are insatiable and unbearable to themselves, and it is conformable to their state that they should always be unquiet, longing and desiring that thing which they have to satiety. This is the reason why such satiety cannot content them, because they (who are infinite in their being) are always desiring something finite; because their being will never end, though their life to grace ends when they commit mortal sin.
“Man is placed above all creatures, and not beneath them, and he cannot be satisfied or content except in something greater than himself. Greater than himself there is nothing but Myself, the Eternal God. Therefore I alone can satisfy him, and, because he is deprived of this satisfaction by his guilt, he remains in continual torment and pain. Weeping follows pain, and when he begins to weep the wind strikes the tree of self-love, which he has made the principle of all his being.” from the Dialogues found here.
Beyond all doubt, sin leads to more sin, just as repentance leads to more holiness and purity. Those who are living in sin desire goodness, but look in the wrong places for love and freedom. Today, too many people have decided for themselves what love is and fall into self-love, the love in the mirror. Only God's love can satisfy the hearts of all men and all women.