Every effort under compulsion demands a sacrifice of energy. I never paid such a price.

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The day science begins to study non-physical phenomena, it will make more progress in one decade than in all the previous centuries of its existence.

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Love: I recognize the emotion for what it is, an irrational self-destructive impulse, which is disguised as joy.

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You may live to see man-made horrors beyond your comprehension.

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All matter comes from a primary substance, the luminiferous ether

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Our senses enable us to perceive only a minute portion of the outside world.

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The opinion of the world does not affect me. I have placed as the real values in my life what follows when I am dead.

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Anti-social behavior is a trait of intelligence in a world full of conformists.

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The desire that guides me in all I do is the desire to harness the forces of nature to the service of mankind.

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We all make mistakes, and it is better to make them before we begin.

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