Greetings

Has anyone ever built a mental temple and conducted magick from it?

A while back I made a mandala that symbolically represents my understanding of magick, and soon realized that its a perfect floor plan for a mental temple. This got me wondering if I can do magick within it using my mental body, while physically I might be laying in my bed, preferably in a trance. Can magick be effective this way, even though I'm physically inactive? Also, do I visualize myself in the first or third person? This may sound like a silly question, but some hypnotherapists advise using the third person for any visualization, saying its better somehow. The only reason I've been able to find why this may be so is that when visualizing in the third person, your emotions are dissociated from what you are seeing, while in first person you may elicit stronger emotions, including the 'lust of result'.

I would appreciate any advice.