Conversely, the vices of the soul are much worse than the passions of the body, both in the actions they produce and in the punishments they incur. I do not know why, but most people overlook this fact. They treat drunkenness, unchastity, adultery, theft and all such vices with great concern, avoiding them or punishing them as something whose very appearance is loathsome to most men. But the passions of the soul are much worse and much more serious then bodily passions. For they degrade men to the level of demons and lead them, insensible as they are, to the eternal punishment reserved for all who obstinately cling to such vices. These passions of the soul are envy, rancor, malice, insensitivity, avarice – which according to the apostle is the root of all evil (cf. 1 Tim. 6:10) – and all vices of a similar nature.
—St. John of Damaskos