Action is the catalyst that creates accomplishments. It is the path that takes us from uncrafted hopes to realized dreams.

There is nothing of permanent value (putting aside a few human affections) nothing that satisfies quiet reflection--except the sense of having worked according to one's capacity and light to make things clear and get rid of cant and shams of all sorts.

There is no absurdity in theology so great that you cannot parallel it by a greater absurdity in Nature.

Freedom and order are not incompatible... truth is strength... free discussion is the very life of truth.

Mr. Darwin's hypothesis is not, so far as I am aware, inconsistent with any known biological fact; on the contrary, if admitted, the facts of Development, of Comparative Anatomy, of Geographical Distribution, and of Palaeontology, become connected together, and exhibit a meaning such as they never possessed before; and I, for one, am fully convinced that if not precisely true, that hypothesis is as near an approximation to the truth as, for example, the Copernican hypothesis was to the true theory of the planetary motions.

'Infidel' is a term of reproach, which Christians and Mohammedans, in their modesty, agree to apply to those who differ from them.

The great tragedy of science - the slaying of a beautiful hypothesis by an ugly fact.