Interestingly, Spinoza who was himself an expert of single-pointed mind (polishing glass for lenses most of the day), had discovered that already 350 years ago. In his book Ethics, he writes that: " the order and connection of ideas are the same as the order and connection of things, and vice versa".
On a personal level, I experienced it greatly since I started meditation. The changes in my health were quite impressive. I also made some research in the field of quantum physics and what is interesting is that the elementary particles that compose our bodies (and everything around us) are at the same time particles.. And waves! Since our thoughts are waves as well, no wonder they affect our bodies...