He who does not lie does not know what truth is.

One may sometimes tell a lie, but the grimace that accompanies it tells the truth.

Man demands truth and fulfills this demand in moral intercourse with other men; this is the basis of all social life. One anticipates the unpleasant consequences of reciprocal lying. From this there arises the duty of truth. We permit epic poets to lie because we expect no detrimental consequences in this case. Thus the lie is permitted where it is considered something pleasant. Assuming that it does no harm, the lie is beautiful and charming.

All the truth in the world adds up to one big lie.

Be careful what you do, because the lie becomes the truth.

Among other common lies, we have the silent lie - the deception which one conveys by simply keeping still and concealing the truth. Many obstinate truth-mongers indulge in this dissipation, imagining that if they speak no lie, they lie not at all.