There are savages without God in any proper sense of the word, but none without ghosts.

God give me strength to face a fact though it slay me.

Matter and force are the two names of the one artist who fashions the living as well as the lifeless.

What men need is, as much knowledge as they can assimilate and organize into a basis for action; give them more and it may become injurious. One knows people who are as heavy and stupid from undigested learning .

Skepticism is the highest duty and blind faith the one unpardonable sin.

Men can intoxicate themselves with ideas as effectually as with alcohol or with bang and produce, be dint of serious thinking, mental conditions hardly distinguishable from monomania.

There is assuredly no more effectual method of clearing up one's own mind on any subject than by talking it over, so to speak, with men of real power and grasp, who have considered it from a totally different point of view.