An actually existing fly is more important than a possibly existing angel.

To the men of this world, to the animal strength and spirits, to the men of practical power, whilst immersed in it, the man of ideas appears out of his reason. They alone gave reason.

People only see what they are prepared to see.

There is not a piece of science, but its flank may be turned tomorrow.

The trail of the serpent reaches into all the lucrative professions and practices of man. Each has its own wrongs. Each finds a tender and very intelligent conscience a disqualification for success. Each requires of the practitioner a certain shutting of the eyes, a certain dapperness and compliance, an acceptance of customs, a sequestration from the sentiments of generosity and love, a compromise of private opinion and lofty integrity.

God has delegated himself to a million deputies.

Talent is commonly developed at the expense of character.