Speech is human nature itself, with none of the artificiality of written language.

Problems are only opportunities in disquise.

The difference between ancients and moderns is that the ancients asked what have we experienced, and moderns asked what can we experience.

How the past perishes is how the future becomes.

Algebra reverses the relative importance of the factors in ordinary language. It is essentially a written language, and it endeavors to exemplify in its written structures the patterns which it is its purpose to convey. The pattern of the marks on paper is a particular instance of the pattern to be conveyed to thought. The algebraic method is our best approach to the expression of necessity, by reason of its reduction of accident to the ghostlike character of the real variable.

The way in which the persecution of Galileo has been remembered is a tribute to the quiet commencement of the most intimate change in outlook which the human race had yet encountered. Since a babe was born in a manger, it may be doubted whether so great a thing has happened with so little stir

Education which is not modern share the fate of all organic things which are kept too long.