Gregory the Great — on Ezek 2:6 (Homilies on Ezekiel, Book 1, Homily 9)

“They would be less evil if those who are unbelieving had not also been subverters. For since they themselves do not believe that there are rewards of the heavenly kingdom or punishments of hell, abandoned to their own depravities, they subvert others as well from faith and good works, so that the kingdom which they themselves refuse to seek, another might not attain either. For when they perceive that certain tender souls are beginning good things and now avoiding evil, by mocking what is promised in heaven, by despising what almighty God threatens concerning the punishments of hell, by praising temporal goods, and by promising with cunning persuasion the pleasures of the present age, they turn aside the minds of the innocent and pervert their paths. They rejoice if they can call anyone back from life and drag them to death; they take delight in their own depravities and exult in those of others as well. Their own punishment is certainly not enough for those who act so as not to die alone.”