Rome Press Inc., 1988. Mechanics is the paradise of the mathematical sciences, because by means of it one comes to the fruits of mathematics. Notebooks , v. 1, ch. He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast. No human investigation can be called real science if it cannot be demonstrated mathematically.
Inequality is the cause of all local movements.
Pleasure with Profit , 1694. All mathematical laws which we find in Nature are always suspect to me, in spite of their beauty. They give me no pleasure. They are merely auxiliaries. At close range it is all not true.