And you very soon find out, if you have not found it out before, that patience and tenacity of purpose are worth more than twice their weight of cleverness.

All knowledge is good. It is impossible to say any fragment of knowledge, however insignificant or remote from one's ordinary pursuits, may not some day be turned to account.

Teach a man to read and write, and you have put into his hands the great keys of the wisdom-box.

In scientific work, those who refuse to go beyond fact rarely get as far as fact.

Science has fulfilled her function when she has ascertained and enunciated truth.

Extinguished theologians lie about the cradle of every science, as strangled snakes beside that of Hercules

The mathematician starts with a few propositions, the proof of which is so obvious that they are called self-evident, and the rest of his work consists of subtle deductions from them. The teaching of languages, at any rate as ordinarily practiced, is of the same general nature authority and tradition furnish the data, and the mental operations are deductive.