"I can calculate the motion of heavenly bodies but not the madness of people." ― Isaac Newton From Isaac Newton Mathematician Added on 1/31/2026 About Isaac Newton Isaac Newton was an English mathematician and physicist whose work transformed mechanics, optics, and astronomy. His formulation of the laws of motion and universal gravitation became foundational to classical physics. Born: 1642-12-25 Died: 1727-03-31 View all quotes from Isaac Newton