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To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

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There comes a time when the mind takes a higher plane of knowledge but can never prove how it got there.

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My religiosity consists of a humble admiration of the infinitely superior spirit who reveals himself in the slight details we are able to perceive wit...more

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True art is characterized by an irresistible urge in the creative artist.

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It stands to the everlasting credit of science that by acting on the human mind it has overcome man's insecurity before himself and before nature.

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I live in that solitude which is painful in youth, but delicious in the years of maturity.

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Everything that is really great and inspiring is created by the individual who can labor in freedom.

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The mystical trend of our time, which shows itself particularly in the rampant growth of the so-called Theosophy and Spiritualism, is for me no more t...more

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Common sense is the collection of prejudices acquired by age 18.

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I gang my own gait and have never belonged to my country, my home, my friends, or even my immediate family, with my whole heart; in the face of all th...more