The class' assignment was to write a paper about what you believe. I wrote a crappy paper about how I didn't believe in an afterlife anymore, on account of my head injury [1]. We all evaluated someone else's paper, and I got a paper from someone who talked about his out-of-body experiences, which I thought was a perfectly reasonable proposition, as I'd recently learned about "mental imagery" (this was before 'aphantasia' [2] was a term)...
[1] https://news.ycombinator.com/item?id=13123659 [2] https://en.wikipedia.org/wiki/Aphantasia
Modern science was founded on the predication that "everything in the universe can be explained in terms of matter." This was circa-1845. The predication would have been more useful if those early scientists thought in terms of 'energy', but we're still stuck with their mistake.