Contrary to the disciples of scientism, physics has limits. Philosopher Ed Feser gives a quick run-down which is worth passing along.

Feser writes,

As I have emphasized many times, what physics gives us is a description of the mathematical structure of physical reality. It abstracts from any aspect of reality which cannot be captured via its exclusively quantitative methods. (emphasis added)

Let’s stop here because this is important. What Feser is saying is that when the methods of physics are applied to any object, any event, any piece of the world around us, the method only addresses the parts of that object, event, or piece of the world that can be mathematically quantified. Physics ignores any parts of the world that cannot be mathematically quantified.

One reason that this is crucial to keep in mind is that from the fact that something doesn’t show up in the description physics gives us, it doesn’t follow that it isn’t there in the physical world. This is like concluding from the fact that color doesn’t show up in a black and white pen and ink drawing of a banana that bananas must not really be yellow.