Most men, it seems to me, do not care for Nature and would sell their share in all her beauty, as long as they may live, for a stated sum—many for a glass of rum. Thank God, men cannot as yet fly, and lay waste the sky as well as the earth!—Journal, 3 January 1861
So mild the air a pleasure 'twas to breathe, For what seems heaven above was earth beneath.—"May Morning"
Some consider blue "to be the color of pure water, whether liquid or solid." But, looking directly down into our waters from a boat, they are seen to be of very different colors. Walden is blue at one time and green at another, even from the same point of view. Lying between the earth and the heavens, it partakes of the color of both. — Walden—Walden
The farmer increases the extent of habitable earth. He makes soil. That is an honorable occupation.—Journal, 2 March 1852
The very willow-rows lopped every three years for fuel or powder,—and every sizable pine and oak, or other forest tree, cut down within the memory of man! As if individual speculators were to be allowed to export the clouds out of the sky, or the stars out of the firmament, one by one. We shall be reduced to gnaw the very crust of the earth for nutriment.—The Maine Woods
There is a certain glory attends on water by night. By it the heavens are related to the earth--Undistinguishable from a sky beneath you.—Journal, 13 June 1851