Heresy is a cradle; orthodoxy a coffin.

If abuses are destroyed, man must destroy them. If slaves are freed, man must free them. If new truths are discovered, man must discover them. If the naked are clothed; if the hungry are fed; if justice is done; if labor is rewarded; if superstition is driven from the mind; if the defenseless are protected, and if the right finally triumphs, all must be the work of man. The grand victories of the future must be won by man, and by man alone.

If we admit that some infinite being has controlled the destinies of persons and peoples, history becomes a most cruel and bloody farce.

Ignorance is the worst form of slavery. (Paraphrased)

Everyone should be taught the nobility of labor, the heroism and splendor of honest effort. As long as it is considered disgraceful to labor, or aristocratic not to labor, the world will be filled with idleness and crime, and with every possible moral deformity.

Prayer is of no avail. The lightning falls on the just and the unjust in accordance with natural laws.

I want no heaven for which I must give my reason; no happiness in exchange for my liberty, and no immortality that demands the surrender of my individuality. Better rot in the windowless tomb, to which there is no door but the red mouth of the pallid worm, than to wear the jeweled collar of a god.