"He who speaks from the lips chatters. He who speaks from an empty mind adds confusion to discord. He who speaks from a full mind feeds the minds of men. He who speaks from his heart wins the confidence of mankind. But he who speaks from his soul heals the heartbreaks of a world and feeds the hungry, starving souls of men. He can dry the tears of anguish and pain. He can bring light, for he will carry light."

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I do not want to presuppose anything as known. I see in my explanation in section 1 the definition of the concepts point, straight line and plane, if one adds to these all the axioms of groups i-v as characteristics. If one is looking for other definitions of point, perhaps by means of paraphrase in terms of extensionless, etc., then, of course, I would most decidedly have to oppose such an enterprise. One is then looking for something that can never be found, for there is nothing there, and everything gets lost, becomes confused and vague, and degenerates into a game of hide and seek.

— David Hilbert