Stand guard at the portal of your mind.

There is no good theory of disease which does not at once suggest a cure.

But wise men pierce this rotten diction and fasten words again to visible things; so that picturesque language is at once a commanding certificate that he who employs it, is a man in alliance with truth and God.

All stealing is comparative. If you come to absolutes, pray who does not steal.

If two or three persons should come with a high spiritual aim and with great powers, the world would fall into their hands like a ripe peach.

Don't ever give up on something or someone that you can't go a full day without thinking about.

Nor has science sufficient humanity, so long as the naturalist overlooks the wonderful congruity which subsists between man and the world; of which he is lord, not because he is the most subtile inhabitant, but because he is its head and heart, and finds something of himself in every great and small thing, in every mountain stratum, in every new law of color, fact of astronomy, or atmospheric influence which observation or analysis lay open.