„And yet this very singleness of vision and thorough oneness with his age is a mark of the successful man. It is as though Nature needs must make men narrow in order to give them force.“

— W.E.B. Du Bois

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„Republicans are men of narrow vision, who are afraid of the future.“
— Jimmy Carter
„From the very nature of progress, all ages must be transitional.“
— Gertrude Stein
„Again and again the imaginary plan on which one attempts to build up that order breaks down and then we must try another. This imaginative vision and faith in the ultimate success are indispensable. The pure rationalist has no place here.“
— Max Planck
„Literature is always personal, always one man's vision of the world, one man's experience, and it can only be popular when men are ready to welcome the visions of others.“
— W.B. Yeats
„In order that people may be happy in their work,these three things are needed:they must be fit for it;they must not do too much of it;and they must have a sense of success in it.“
— John Ruskin