I'd never seen this excerpt before (just the beginning snippet). But what would the author of the most important and revolutionary scientific work of all time know? Folks, let's keep "F=ma" and calculus, but throw out the diseased ravings that obviously come from a confused, superstitious, irrational mind.
In reality, Newton writes very well and profoundly on this topic. I wonder why I've never heard that this was contained in The Principia? Materialists only tend to quote the beginning of the excerpt, but never the rest. I guess it's just a coincidence.
From a slightly different angle, this is a good post.