Newton's great innovations in mathematics, optics and mechanics also made Barrow deeply aware of his backwardness. However, Barrow was not jealous of Newton at all. On the contrary, he frankly announced that Newton had surpassed himself. At the same time, Professor Barrow made an important decision to quit the Lucas lecture and recommended Newton to succeed him.

166910 June 19, Newton succeeded Lucas Professor of Mathematics at Cambridge University. Newton was only 27 years old this year.

From then on, Newton climbed to the top of the university ladder at a young age-professor. He even got special permission from the king to let the layman stay as a researcher at Trinity College. Because British law stipulates that university professors must accept clergy.