The birth of science as we know it arguably began with Isaac Newton's formulation of the laws of gravitation and motion. It is no exaggeration to say that physics was reborn in the early 20th-century with the twin revolutions of quantum mechanics and the theory of relativity.
The history of philosophy is not like the history of the sciences to be studied with the intellect alone. That which is receptive in us and that which impinges upon us from history is the reality of man's being unfolding itself in thought.
