Respectfully Quoted: A Dictionary of Quotations. 1989.
Ralph Waldo Emerson (180382)
What is life but the angle of vision? A man is measured by the angle at which he looks at objects. What is life but what a man is thinking of all day? This is his fate and his employer. Knowing is the measure of the man. By how much we know, so much we are.
RALPH WALDO EMERSON, Natural History of Intellect, part 1, Natural History of Intellect and Other Papers (vol. 12 of The Complete Works of Ralph Waldo Emerson), p. 10 (1921).