This is a very important point. Both Being and Consciousness are impenetrable mysteries. When you think about it, they are functionally inseparable. I'm glad you mentioned Heidegger in this light. I'd also suggest mentioning Berkeley. He might not have used the same terms, but I'd argue he believed Consciousness WAS Being, that consciousness is the only thing that is.

Thank you for the last Harris quote. I thought it was very profound and evocative. It suggests that Love is as much a mystery as Being / Consciousness, which makes a lot of sense to me.

Have you read Carlo Rovelli's "Hegoland"? Great book! He argues that the world we perceive is not "matter" but relationships. (He doesn't touch on love at all though. He is still very much a physicist.)