Jealousy is a strange transformer of characters.

It seems very strange ... that in the course of the world's history so obvious an improvement should never have been adopted. ... The next generation of Britishers would be the better for having had this extra hour of daylight in their childhood.

The chief proof of man's real greatness lies in his perception of his own smallness.

Circumstantial evidence is occasionally very convincing, as when you find a trout in the milk, to quote Thoreau's example.

Do you know anything on earth which has not a dangerous side if it is mishandled and exaggerated?

If the fresh facts come to our knowledge all fit themselves into the scheme, then our hypothesis may gradually become a solution. Sherlock Holmes speaking with Dr. Watson.

To let the brain work without sufficient material is like racing an engine. It racks itself to pieces.