Perseverance must have some practical end, or it does not avail the man possessing it. A person without a practical end in view becomes a crank or an idiot. Such persons fill our asylums.

Alexander Graham Bell (1847-1922) Scottish-American scientist, inventor, engineer
Interview, in Orison Swett Marden, How They Succeeded, ch. 2 (1901)
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Added on 7-Apr-16 | Last updated 7-Apr-16
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