Isaac Newton said that science should do what over and over again?

Isaac Newton, a worldwide known astronomer, physicist, mathematician and the creator of famous "Three Laws of Newton" brought up a metaphor of dwarfs standing on the shoulders of giants from the 12th century. The meaning of the above-mentioned metaphor is that people should discover truth based on previous experiences. The exact phrase Newton said in 1675 was that if he had seen further that was by standing on the shoulders of Giants.