Metaphor may be OK. If there's any religious impulse involved I just tend to find it annoying. I haven't read Emerson, but I don't think your transcendentalism has anything to do with 'spirituality'. You said it takes you out of yourself. What you mean is that you occasionally experience something different from the everyday. YOU see YOURSELF from a different perspective. Nothing mysterious in it. Human brains are like that. What I can bet on is that your experience is absolutely unique to you, precisely because it comes from YOUR brain and not from the cosmos or god.