„My second fixed idea is the uselessness of men above sixty years of age, and the incalculable benefit it would be in commercial, political, and in professional life, if as a matter of course, men stopped work at this age.“

— William Osler

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„What horrifies me most is the idea of being useless: well-educated, brilliantly promising, and fading out into an indifferent middle age.“
— Sylvia Plath
„Take the sum of human achievement in action, in science, in art, in literature—subtract the work of the men above forty, and while we should miss great treasures, even priceless treasures, we would practically be where we are today … The effective, moving, vitalizing work of the world is done between the ages of twenty-five and forty.“
— William Osler
„Here is the wisdom of the ages: Men rule but women decide.“
— Robert A. Heinlein
„Preparatory Men. — I welcome all signs that a more virile, warlike age is about to begin, which will restore honor to courage above all! For this age shall prepare the way for one yet higher, and it shall gather the strength that this higher age will require some day — the age that will carry heroism into the search for knowledge and that will wage wars for the sake of ideas and their consequences.“
— Friedrich Nietzsche