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.

The reason why the world lacks unity, and lies broken and in heaps, is, because man is disunited with himself.

How much more the seeker of abstract truth, who needs periods of isolation, and rapt concentration, and almost a going out of thebody to think!

It is a capital blunder; as you discover, when another man recites his charities.

We are by nature observers, and thereby learners. That is our permanent state.

Skepticism is slow suicide.

I--this thought which is called I--is the mould into which the world is poured like melted wax.