“If you want to find out what a man is to the bottom, give him power. Any man can stand adversity — only a great man can stand prosperity. It is the glory of Abraham Lincoln that he never abused power only on the side of mercy”

“Any doctrine that will not bear investigation is not a fit tenant for the mind of an honest man. Any doctrine that will not bear investigation is not a fit tenant for the mind of an honest man. Any man who is afraid to have his doctrine investigated is not only a coward but a hypocrite.”

“No one, in the world's whole history, ever attempted to substantiate a truth by a miracle. Truth scorns the assistance of miracle. Nothing but falsehood ever attested itself by signs and wonders. No miracle ever was performed, and no sane man ever thought he had performed one, and until one is performed, there can be no evidence of the existence of any power superior to, and independent of nature.”

“The glory of science is, that it is freeing the soul -- breaking the mental manacles -- getting the brain out of bondage -- giving courage to thought -- filling the world with mercy, justice, and joy.”

“He was a worshiper of liberty, a friend of the oppressed. A thousand times I have heard him quote these words: "For Justice all place a temple, and all season, summer." He believed that happiness is the only good, reason the only torch, justice the only worship, humanity the only religion, and love the only priest.”

“Reason, Observation and Experience — the Holy Trinity of Science — have taught us that happiness is the only good; that the time to be happy is now, and the way to be happy is to make others so. This is enough for us. In this belief we are content to live and die. If by any possibility the existence of a power superior to, and independent of, nature shall be demonstrated, there will then be time enough to kneel. Until then, let us stand erect.”

“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.”