It is not length of life, but depth of life.

The student is to read history actively and not passively; to esteem his own life the text, and books the commentary. Thus compelled, the muse of history will utter oracles as never to those who do not respect themselves.

True wit never made us laugh.

Public opinion, I am sorry to say, will bear a great deal of nonsense. There is scarcely any absurdity so gross, whether in religion, politics, science or manners, which it will not bear.

These arts open great gates of a future, promising to make the world plastic and to lift human life out of its beggary to a god- like ease and power.

Explore, and explore, and explore. Be neither chided nor flattered out of your position of perpetual inquiry. Neither dogmatise yourself, nor accept another's dogmatism. Why should you renounce your right to traverse the star-lit deserts of truth, for the premature comforts of an acre, house, and barn? Truth also has its roof, and bed, and board. Make yourself necessary to the world, and mankind will give you bread, and if not store of it, yet such as shall not take away your property in all men's possessions, in all men's affections, in art, in nature, and in hope.

No man acquires property without acquiring with it a little arithmetic also.