The ordinary man is ruined by the flesh lusting against the spirit; the scholar by the spirit lusting too much against the flesh.

It is hardly to be believed how spiritual reflections when mixed with a little physics can hold people's attention and give them a livelier idea of God than do the often ill-applied examples of his wrath.

The highest level than can be reached by a mediocre but experienced mind is a talent for uncovering the weaknesses of those greater than itself.

A good metaphor is something even the police should keep an eye on.

Most subjects at universities are taught for no other purpose than that they may be re-taught when the students become teachers.

The most dangerous untruths are truths slightly distorted.

Nothing puts a greater obstacle in the way of the progress of knowledge than thinking that one knows what one does not yet know.