Corruption is the sin which, rather than being recognized as such and making us humble, is elevated to a system, it becomes a mental habit, a way of living. We no longer feel the need for forgiveness and mercy, but we justify ourselves and our behaviors. Jesus says to his disciples: Even if your brother offends you seven times a day and seven times a day he returns to you to ask for forgiveness, forgive him. The repentant sinner, who sins again and again because of his weakness, will find forgiveness if he acknowledges his need for mercy. The corrupt man is the one who sins but does not repent, who sins and pretends to be Christian, and it is this double life that is scandalous.
— Pope Francis, The Name of God Is Mercy, p. 81