The eye, whose function we so certainly know by experience, has, down to my own time, been defined by an infinite number of authors as one thing; but I find, by experience, that it is quite another.The eye, whose function we so certainly know by experience, has, down to my own time, been defined by an infinite number of authors as one thing; but I find, by experience, that it is quite another.

— Leonardo da Vinci

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The development of the new science has constantly continued to follow an upward course.The development of the new science has constantly continued to follow an upward course.

— Marie Curie

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This method has come into general application, and is similar in some ways to spectral analysis.This method has come into general application, and is similar in some ways to spectral analysis.

— Marie Curie

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The instinct of imitation is implanted in man from childhood.The instinct of imitation is implanted in man from childhood.

— Aristotle

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Such a person may be said indeed to love to learn.Such a person may be said indeed to love to learn.

— Confucius

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In an instant we see an infinite number of forms, still we only take in thoroughly one object at a time.In an instant we see an infinite number of forms, still we only take in thoroughly one object at a time.

— Leonardo da Vinci

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Practice must always be founded on sound theory.Practice must always be founded on sound theory.

— Leonardo da Vinci

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This conviction was based solely on the atomic nature of radioactivity.This conviction was based solely on the atomic nature of radioactivity.

— Marie Curie

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From that time onward numerous scientists devoted themselves to the study of radioactivity.From that time onward numerous scientists devoted themselves to the study of radioactivity.

— Marie Curie

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The artist ought first to exercise his hand by copying drawings from the hand of a good master.The artist ought first to exercise his hand by copying drawings from the hand of a good master.

— Leonardo da Vinci

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The fool who knows his foolishness, is wise at least so far.The fool who knows his foolishness, is wise at least so far.

— Buddha

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The radium spectrum is very precisely known.The radium spectrum is very precisely known.

— Marie Curie

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