There are three points of doctrine the belief of which forms the foundation of all morality. The first is the existence of God; the second is the immortality of the human soul; and the third is a future state of rewards and punishments. Suppose it possible for a man to disbelieve either of these three articles of faith and that man will have no conscience, he will have no other law than that of the tiger or the shark. The laws of man may bind him in chains or may put him to death, but they never can make him wise, virtuous, or happy.

Life is a problem; mortal man was made to solve the solemn problem right or wrong.

A barbarian who could not write a sentence of grammar and hardly could spell his own name.... One of our tribe of great men who turn disease to commodity...he craves the sympathy for sickness as a portion of his glory.

...he [Muhammad] declared undistinguishing and exterminating war, as a part of his religion, against all the rest of mankind...The precept of the Koran is, perpetual war against all who deny, that Mahomet is the prophet of God.

I would much rather be found guilty of making a serious mistake in judgment, than to be accused of being even a little bit insincere.

Civil liberty can be established on no foundation of human reason which will not at the same time demonstrate the right of religious freedom.

I have for many years made it a practice to read through the Bible once every year.