Of God and His Creatures

We have not gained by the divorce between philosophy and what is now called 'science,' as though philosophy were not science, or (physical) science were not one branch of philosophy. The word 'philosopher' in the text therefore includes the physicist. Nor does the word 'philosopher' exclude the 'faithful Christian man.' It is a difference of formalities, or characters, as between 'professor' and 'volunteer,' not an incompatibility.

Of God and His Creatures: 2.4