In drying plants, botanists often dry themselves. Dry words and dry facts will not fire hearts.

I will follow my instincts, be myself for good or ill, and see what will be the upshot.

The power of imagination makes us infinite.

…their eager, childlike attention was refreshing to see as compared with the decent, deathlike apathy of weary civilized people, in whom natural curiosity has been quenched in toil and care and poor, shallow comfort.

There are no accidents in Nature. Every motion of the constantly shifting bodies in the world is timed to the occasion for some definite, fore-ordered end. The flowers blossom in obedience to the same law that marks the course of constellations, and the song of a bird is the echo of a universal symphony. Nature is one, and to me the greatest delight of observation and study is to discover new unities in this all-embracing and eternal harmony.

When I first caught sight of (Mount Shasta) over the braided folds of the Sacramento Valley I was fifty miles away and afoot, alone and weary. Yet all my blood turned to wine, and I have not been weary since.

How narrow we selfish conceited creatures are in our sympathies! How blind to the rights of all the rest of creation!