"Newton was indisputably the chief contributor to the popularity of the philosophy of Locke, or the English method of treating of Philosophy, and more especially did he promote its application to all the physical sciences. “Physics, beware of metaphysics,” was his maxim, which signifies, Science, beware of thought; and all the physical sciences, even to the present day, have, following in his wake, faithfully observed this precept, inasmuch as they have not entered upon an investigation of their conceptions, or thought about thoughts. Physics can, however, effect nothing without thought; it has its categories and laws through thought alone, and without thought it does not effect any progress.

In the beginnings of physical science we read of the power of inertia, for instance, of the force of acceleration, of molecules, of centripetal and centrifugal force, as of facts which definitely exist; what are really the final results of reflection are represented as their first grounds. If we ask for the cause of there being no advance made in such sciences, we find that it is because men do not understand that they should apply themselves to Notions, but make up their minds to adopt these determinations without sense or understanding."

-Hegel