Geometry does not teach us to draw these lines, but requires them to be drawn; for it requires that the learner should first be taught to describe these accurately, before he enters upon geometry; then it shows how by these operations problems may be solved.
(The Principia - Preface, 1687)

Isaac Newton

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If I have seen further it is by standing on the shoulders of giants.

Isaac Newton (Letter to Robert Hooke, 1676)

We build too many walls and not enough bridges.

Isaac Newton

Plato is my friend, Aristotle is my friend, but my greatest friend is truth.

Isaac Newton (Notes - Certain Philosophical Questions, 1664) 

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