Heaven knows what seeming nonsense may not tomorrow be demonstrated truth.

It is impossible to meditate on time and the mystery of nature without an overwhelming emotion at the limitations of human intelligence.

In order to acquire learning, we must first shake ourselves free of it.

The only use of a knowledge of the past is to equip us for the present. The present contains all that there is. It is holy ground; for it is the past, and it is the future.

So far as the mere imparting of information is concerned, no university has had any justification for existence since the popularization of printing in the fifteenth century.

Problems are only opportunities in disquise.

Knowledge shrinks as wisdom grows.