To the person with a firm purpose all men and things are servants.

Mathematics can remove no prejudices and soften no obduracy. It has no influence in sweetening the bitter strife of parties, and in the moral world generally its action is perfectly null.

Napoleon affords us an example of the danger of elevating one's self to the absolute, and sacrificing everything to the carrying out of an idea.

A mathematician is only perfect insofar as he is a perfect man, sensitive to the beauty of truth.

The beautiful is a phenomenon which is never apparent of itself, but is reflected in a thousand different works of the creator.

Publishers are all cohorts of the devil; there must be a special hell for them somewhere.

Every step of life shows much caution is required.