The sky is the daily bread of the eyes.

— Emerson, Ralph Waldo

And that inverted bowl we call The Sky, where under crawling coop't we live and die, lift not thy hands to It for help -- for it rolls impotently on as thou or I.

— Khayyam, Omar

I never saw a man who looked with such a wistful eye upon that little tent of blue which prisoners call the sky.

— Wilde, Oscar