Mathematically Calculating how the world works was one of the main passions of Newton which eventually became the foundation of almost all of his scientific discoveries and some theories in other fields. Calling him a super hero in the world of numbers will not be wrong with his ability to design formulas for quickly calculating massive expansions in numbers. Calculus was his master piece. At the age of 24 he invented Integral Calculus while he was stuck at home due to Great Plague during 1665 - 1666. So these 2 years, when London was facing Death, basically laid the foundation for becoming “Sir Isaac Newton”. It was the most important achievement of his life and footing of the modern mathematics even until today.

Static Maths (like area of still Triangle) didn’t impress Newton, he was more interested in life and moving things. Wanted to measure change, like “speed of a falling apple - because it is changing speed constantly during the fall”. Normal math, at the time, couldn’t catch it. So he invented calculus, slicing time and motion into infinite small pieces called “Fluxions (meaning ‘changes’)”. And he was capable to calculate the exact change of rate in speed of a “falling apple”. After that, he could calculate the rate of change of anything - curves, paths, even planets speed in the solar system. Calculus was what we could safely call “Newton’s Language”.

The common factor in all these laws was his aptitude towards calculation of change, in this case, calculate the Force. Using his already refined abilities of cooking formulas, used the same process in this case by first assigning the words to variables of a problem like Mass (m), Acceleration (a) and Force (F) and putting numbers on the variables and performing calculation experiments, he eventually proved that Force is equal to mass times acceleration (Second Law of Motion). The person who already had invented calculus, this thought process probably seemed natural to him that if he put a number to object’s mass and measure how fast it changed the speed then he could find out the invisible force behind it. This was Newton’s greatest shorthand ever “F = ma”.

This was another side of Newton’s life where he wanted the cure of all diseases, wanted to live longer (forever may be), but didn’t change his working principle. He approached it with science not with magic. The science of elements - laboratory work, mixing elements, transforming them and his work was not a complete waste of time but it explained that combining elements in a specific patterns produce results. He was obsessed with “mercury” calling it the seed of all metals, spent hundreds of hours in those experiments with chemicals which likely caused the “nervous breakdowns” he had later in life.

A mind and body that never stopped working. He took on a new interest at age of 53 in 1696 - A Public Service job at Royal Mint, the institution responsible for making England’s coins. He played a role in the massive recall of silver coins in country and oversaw the complete process of melting down all silver and introduced “milled edges” on coins to prevent coin clipping. In 1717, England was shifted to Gold Standard from Silver because of his issued report on fixed exchange rates of Gold and Silver.