We are on the earth, and they tell us of heaven; we are human beings, and they tell us of angels and devils; we are matter, and they tell us of spirit; we have five senses whereby to admit truths, and a reasoning faculty by which to build our belief upon them; and they tell us of dreams dreamed thousands of years ago, which our experience flatly contradicts.

Fathers and husbands! do ye not also understand this fact? Do ye not see how, in the mental bondage of your wives and fair companions, ye yourselves are bound?

You have heard of, and studied various systems of philosophy; but real philosophy is opposed to all systems.

The knowledge of one generation is the ignorance of the next.

These will vary in every human being; but knowledge is the same for every mind, and every mind may and ought to be trained to receive it.

If we bring not the good courage of minds covetous of truth, and truth only, prepared to hear all things, and decide upon all things, according to evidence, we should do more wisely to sit down contented in ignorance, than to bestir ourselves only to reap disappointment.

Credulity is always ridiculous.