
Source: Don Quixote de la Mancha (1605–1615), Part I, Book IV, Ch. 23.
Source Book in Ancient Philosophy (1907), The Golden Sayings of Democritus
Source: Don Quixote de la Mancha (1605–1615), Part I, Book IV, Ch. 23.
“When a man has put a limit on what he will do, he has put a limit on what he can do.”
“What a man has, so much he is sure of.”
Variant: What a man has, so much he is sure of.
Source: Don Quixote de la Mancha (1605–1615), Part II (1615), Book III, Ch. 43.
Letter to Octave Chanute (1 June 1900)
Context: Lilienthal’s enthusiastic efforts to arouse others may yet prove his most valuable contribution to the solution of the problem. What one man can do himself directly is but little. If however he can stir up ten others to take up the task he has accomplished much.