To a dull mind all of nature is leaden. To the illumined mind the whole world burns and sparkles with light.

Wherever the truth is injured, defend it.

God evidently does not intend us all to be rich, or powerful or great, but He does intend us all to be friends.

I suppose an entire cabinet of shells would be an expression of the whole human mind; a Flora of the whole globe would be so likewise, or a history of beasts; or a painting of all the aspects of the clouds. Everything is significant.

Accuracy is essential to beauty.

Calmness is always godlike.

The spirit of the world, the great calm presence of the creator, comes not forth to the sorceries of opium or of wine.