Common sense is genius in homespun.

Algebra reverses the relative importance of the factors in ordinary language.

Art flourishes where there is a sense of adventure.

I consider Christian theology to be one of the great disasters of the human race.

A science which hesitates to forget its founders is lost.

Our reasonings grasp at straws for premises and float on gossamers for deductions.

It is not paradox to say that in our most theoretical moods we may be nearest to our most practical applications.