"Beware of the leaven of the pharisees, which is hypocrisy. For there is nothing covered that will not be revealed, nor hidden that will not be known. Therefore whatever you have spoken in the dark will be heard in the light, and what you have spoken in the ear in inner rooms will be proclaimed on the housetops. And I say to you: My friends do not be afraid of those who kill the body, and after that have no more that they can do. But I will show you whom you should fear; fear Him, who, after He has killed, has power to cast into hell. Yes, I say to you, fear Him!"
There is probably no more detested vice than that of hypocrisy. Yet it is pervasive.
Living a Lie
Hypocrisy involves the deception of others. Hypocrisy is living a lie. Hypocrisy is the state of pretending to have beliefs, opinions, virtues, feelings, qualities or standards that one does not actually have. Hypocrisy is far more than simply failing to practice all those virtues that one promotes. For example, an alcoholic may sincerely advocate temperance without any hypocrisy, as long as that alcoholic makes no pretence of constant sobriety. Everyone should seek to attain to the highest Biblical standards, without pretending that they have already achieved perfection.