Nothing could be more dangerous to the existence of this Republic than to introduce religion into politics

In making up my mind as to what Mr. Lincoln really believed, I do not take into consideration the evidence of unnamed persons or the contents of anonymous letters; I take the testimony of those who knew and loved him, of those to whom he opened his heart and to whom he spoke in the freedom of perfect confidence.

If a man wishes to have God recognized in the constitution of our country, let him read the history of the Inquisition, and let him remember that hundreds of millions of men, women, and children have been sacrificed to placate the wrath, or win the approbation of this god.

Do you not know that every religion in the world has declared every other religion a fraud? Yes, we all know it. That is the time all religions tell the truth - each of the other.

All should be taught that the highest ambition is to be happy, and to add to the well-being of others; that place and power are not necessary to success; that the desire to acquire great wealth is a kind of insanity. They should be taught that it is a waste of energy, a waste of thought, a waste of life, to acquire what you do not need and what you do not really use for the benefit of yourself or others.

There can be but little liberty on earth while men worship a tyrant in heaven.

It cannot be said too often that actions are good or bad in the light of consequences, and that a clear perception of consequences would control actions. That which increases the sum of human happiness is moral; and that which diminishes the sum of human happiness is immoral. . . . Blind, unreasoning obedience is the enemy of morality.