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Those people who are always improving never become great. Greatness is an eminence, the ascent to which is steep and lofty, and which a man must seize on at once by natural boldness and vigor, and not by patient, wary steps.

William Hazlitt (2015). “Delphi Collected Works of William Hazlitt (Illustrated)”, p.1501, Delphi Classics
Those people who are always improving never become great. Greatness is an eminence, the ascent to which is steep and lofty, and which a man must seize on at once by natural boldness and vigor, and not by patient, wary