The way to mend the bad world is to create the right world.

We are always getting ready to live but never living.

Invention breeds invention.

Accept the place the divine providence has found for you, the society of your contemporaries, the connection of events.

If we encounter a man of rare intellect, we should ask him what books he reads.

A painter told me that nobody could draw a tree without in some sort becoming a tree; or draw a child by studying the outlines of its form merely but by watching for a time his motions and plays, the painter enters into his nature and can then draw him at every attitude.

Tobacco and opium have broad backs, and will cheerfully carry the load of armies, if you choose to make them pay high for such joy as they give and such harm as they do.