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.

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

A little pure wildness is the one great present want, both of men and sheep.

A lifetime is so little a time that we die before we get ready to live. I should like to study at a college, but then I have to say to myself: "You will die before you can do anything else".

Who wouldn't be a mountaineer! Up here all the world's prizes seem nothing

So also there are tides and floods in the affairs of men, which in some are slight and may be kept within bounds, but in others they overmaster everything.

In every walk with nature one receives far more than he seeks.