What one man calls God, another calls the laws of physics.

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All matter comes from a primary substance, the luminiferous ether

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The idea came like a flash of lightning and in an instant the truth was revealed.

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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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Though free to think and act, we are held together, like the stars in the firmament, with ties inseparable. These ties cannot be seen, but we can feel them.

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I don't care that they stole my idea . . I care that they don't have any of their own

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

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I do not think you can name many great inventions that have been made by married men.

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It’s not the love you make. It's the love you give.

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