he who immorally makes use of morality solely to deceive by his solemn display of virtue, and hides the evil disposition of his will under the outward form of piety, barters virtue for the guile of hypocrisy.
Maximos the Confessor defines hypocrisy as the structural inversion of virtue — a weaponization of pious appearance to conceal an evil will — and identifies it as one of the four demonic passions that corrupt the virtuous life.
, The Philokalia, Volume 4, 1995thesis