“We need sometimes to escape into open solitudes, into aimlessness, into the moral holiday of running some pure hazard in order to sharpen the edge of life, to taste hardship, and to be compelled to...”

“Everything in nature is lyrical in its ideal essence, tragic in its fate, and comic in its existence.”

“To be happy you must have taken the measure of your powers, tasted the fruits of your passion, and learned your place in the world.”

“Consciousness is a born hermit.”

“The earth has its music for those who will listen.”

“A string of excited, fugitive, miscellaneous pleasures is not happiness; happiness resides in imaginative reflection and judgment, when the picture of ones life, or of human life, as it truly has b...”

“I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettie...”

“To know the history of science is to recognize the mortality of any claim to universal truth. ”

“The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.”