Repetition does not transform a lie into a truth.

The machinery of propaganda may pack their minds with falsehood and deny them truth for many generations of time. But the soul of man thus held in trance, or frozen in a long night, can be awakened by a spark coming from God knows where, and in a moment the whole structure of lies and oppression is on trial for its life.

In matters of truth and justice, there is no difference between large and small problems, for issues concerning the treatment of people are all the same.

Expectations are a form of first-class truth: If people believe it, it's true.

I believe there exists, & I feel within me, an instinct for the truth, or knowledge or discovery, of something of the same nature as the instinct of virtue, & that our having such an instinct is reason enough for scientific researches without any practical results ever ensuing from them.

Never tell the truth to people who are not worthy of it.