Do not teach too many subjects and what you teach, teach thoroughly.

The whole of mathematics consists in the organization of a series of aids to the imagination in the process of reasoning.

Mathematics as a science, commenced when first someone, probably a Greek, proved propositions about "any" things or about "some" things, without specifications of definite particular things.

I consider Christianity to be one of the great disasters of the human race... It would be impossible to imagine anything more un - Christianlike than theology.

Civilization advances by extending the number of important operations which we can perform without thinking of them.

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

Aristotle discovered all the half-truths which were necessary to the creation of science.