Isaac Newton — English Mathematician born on December 25, 1642, died on March 20, 1727

Sir Isaac Newton PRS MP was an English physicist and mathematician who is widely recognised as one of the most influential scientists of all time and as a key figure in the scientific revolution. His book Philosophiæ Naturalis Principia Mathematica, first published in 1687, laid the foundations for classical mechanics. Newton made seminal contributions to optics, and he shares credit with Gottfried Leibniz for the development of calculus... (wikipedia)

To every action there is always opposed an equal reaction.
To every action there is always opposed an equal reaction, or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.
We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.
If I have seen further than others, it is by standing upon the shoulders of giants.
A man may imagine things that are false, but he can only understand things that are true, for if the things be false, the apprehension of them is not understanding.