A book is a mirror: if an ape looks into it an apostle is hardly likely to look out.

A handful of soldiers is always better than a mouthful of arguments.

Some people read only because they are too lazy to think.

Prejudices are so to speak the mechanical instincts of men: through their prejudices they do without any effort many things they would find too difficult to think through to the point of resolving to do them.

A good method of discovery is to imagine certain members of a system removed and then see how what is left would behave: for example, where would we be if iron were absent from the world: this is an old example.

Honest unaffected distrust of human abilities under all circumstances is the surest sign of strength of mind.

Do not judge God's world from your own. Trim your own hedge as you wish and plant your flowers in the patterns you can understand, but do not judge the garden of nature from your little window box.