“The health of the eye seems to demand a horizon. We are never tired, so long as we can see far enough.”
Source: Nature
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Ralph Waldo Emerson 727
American philosopher, essayist, and poet 1803–1882Related quotes

Oui interview (1979)
Context: There’s no reason to assume that my idea of what‘s better would really be better. I resent it when other people try to inflict their ideas of betterness on me. I don’t think they know. And I can’t see any authority on the horizon that’s got any answers that seem worthwhile. Most of the things that are suggested are probably detrimental to your mental health.

“So long as men can breathe or eyes can see,
So long lives this, and this gives life to thee.”
Source: Sonnets (1609), XVIII
Source: Shakespeare's Sonnets

Pages 12-13
Other writings, The Nature of the Judicial Process (1921)
Context: There is in each of us a stream of tendency, whether you choose to call it philosophy or not, which gives coherence and direction to thought and action. Judges cannot escape that current any more than other mortals. All their lives, forces which they do not recognize and cannot name, have been tugging at them — inherited instincts, traditional beliefs, acquired convictions; and the resultant is an outlook on life, a conception of social needs. … In this mental background every problem finds it setting. We may try to see things as objectively as we please. None the less, we can never see them with any eyes except our own.

“When we are tired, we are attacked by ideas we conquered long ago.”

1950s
Source: Montgomery Bus Boycott speech, at Holt Street Baptist Church (5 December 1955) http://www.blackpast.org/?q=1955-martin-luther-king-jr-montgomery-bus-boycott
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 304.

"To the Indianapolis Clergy." The Iconoclast (Indianapolis, IN) (1883)