An excuse is worse and more terrible than a lie; for an excuse is a lie guarded.

We call first truths those we discover after all the others.

Truly, to tell lies is not honorable; but when the truth entails tremendous ruin, to speak dishonorably is pardonable.

I have met men who are habitual liars. They have lied so long that they no longer can distinguish between the truth and a lie. Their sensitivity to sin has been almost completely deadened.

My way of joking is to tell the truth. It is the funniest joke in the world.

Only in men's imagination does every truth find an effective and undeniable existence. Imagination, not invention, is the supreme master of art as of life.

Unthinking respect for authority is the greatest enemy of truth.

If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.

If you compromise your own conscience, you will weaken your conscience. Soon your conscience will fail to guide you and you never will have real wealth based on peace of mind.