There are a terrible lot of lies going around the world, and the worst of it is half of them are true.

Men occasionally stumble over the truth, but most of them pick themselves up and hurry off as if nothing ever happened.

So many people today — and even professional scientists — seem to me like someone who has seen thousands of trees but has never seen a forest. A knowledge of the historic and philosophical background gives that kind of independence from prejudices of his generation from which most scientists are suffering. This independence created by philosophical insight is — in my opinion — the mark of distinction between a mere artisan or specialist and a real seeker after truth. Letter to Robert A. Thorton, Physics Professor at University of Puerto Rico (7 December 1944).

In time of war, when truth is so precious, it must be attended by a bodyguard of lies.

And ye shall know the truth, and the truth shall make you free.

Truth will sooner come out from error than from confusion.

Love truth, but pardon error.

So blind is the curiosity by which mortals are possessed, that they often conduct their minds along unexplored routes, having no reason to hope for success, but merely being willing to risk the experiment of finding whether the truth they seek lies there.

No pleasure is comparable to the standing upon the vantage-ground of truth.

What is truth? said jesting Pilate, and would not stay for an answer.

A subtle thought that is in error may yet give rise to fruitful inquiry that can establish truths of great value.

They who know the truth are not equal to those who love it, and they who love it are not equal to those who delight in it.

We too often forget that not only is there "a soul of goodness in things evil," but very generally also, a soul of truth in things erroneous.