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Nothing has afforded me so convincing a proof of the unity of the Deity as these purely mental conceptions of numerical and mathematical science which have been by slow degrees vouchsafed to man, and are still granted in these latter times by the Differential Calculus, now superseded by the Higher Algebra, all of which must have existed in that sublimely omniscient Mind from eternity.

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Aug 16, 2026

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Quote Author: Rollo May

Rollo May

Rollo May

Rollo May (April 21, 1909, Ada, Ohio - October 22, 1994, Tiburon, California) was an American existential psychologist, authoring the influential book Love and Will in 1969.

Although he is often associated with humanistic psychology, he differs from other humanistic psychologists such as Virginia Satir, Abraham Maslow or Carl Rogers in showing a sharper awareness of the tragic dimensions of human existence. May was a close friend of the U.S. German-born theologian Paul Tillich. His works include Love and Will and The Courage to Create, the latter title honoring Tillich's The Courage to Be.

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