The mind, in discovering truths, acts in the same manner as it acts through the eye in discovering objects; when once any object has been seen, it is impossible to put the mind back to the same condition it was in before it saw it.

Human nature is not of itself vicious.

To argue with a man who has renounced the use and authority of reason, and whose philosophy consists in holding humanity in contempt, is like administering medicine to the dead, or endeavoring to convert an atheist by scripture.

If anything had or could have a value equal to gold and silver, it would require no tender law; and if it had not that value it ought not to have such a law; and, therefore, all tender laws are tyrannical and unjust and calculated to support fraud and oppression.

Truth never envelops itself in mystery, and the mystery in which it is at any time enveloped is the work of its antagonist, and never of itself.

As to the Christian system of faith, it appears to me as a species of Atheism — a sort of religious denial of God. It professes to believe in a man rather than in God. It is a compound made up chiefly of Manism with but little Deism, and is as near to Atheism as twilight is to darkness. It introduces between man and his Maker an opaque body, which it calls a Redeemer, as the moon introduces her opaque self between the earth and the sun, and it produces by this means a religious, or an irreligious, eclipse of light. It has put the whole orbit of reason into shade.

Whatever is my right as a man is also the right of another; and it becomes my duty to guarantee as well as to possess.