When he to whom one speaks does not understand, and he who speaks himself does not understand, that is metaphysics. – Voltaire, Philosophical Dictionary

Get married, in any case. If you happen to get a good mate, you will be happy; if a bad one, you will become philosophical, which is a fine thing in itself. – Socrates, in Diogenes Laertius, Lives

Religion is a man using a divining rod. Philosophy is a man using a pick and shovel. – Author Unknown

Nobody can have the consolations of religion or philosophy unless he has first experienced their desolations. – Aldous Huxley, Themes and Variations, 1950