I can relate to almost all of this (just the quoted part). I am OCDish. I hate it when i get a song, phrase, or name stuck in my head. the only way to get it out is to replace it with another song, phrase, or name. It's really annoying.

I don't have delusions like yours, but I have been delusional during depression. I had a very profound depression 2 years ago and my thinking was so off that I wasn't aware of how off it was until I verbalized my thoughts to a close friend and heard the words coming out of my mouth. My depressive delusions are scary. Truthfully, there are small leftover fragments that I haven't been totally able to shed to this day.

When I am on the up side, I just feel deeply connected to all that lives and breathes in nature. There is this entertwined energy that I experience, where all things are one...we all move together, breath together, in perfect harmony and balance. My eyes view things in technicolor or something...like someone bumped up the saturation of all colors. I just see the most beautiful side of all things. This is a minuscule rendering of what the experience FEELS like. It is truly moving and one of the most beautiful experiences I have had in life; spiritual for sure. I know pop psych slaps a "Manic" label on it, but I am still not so sure. I guess, maybe.

Anyhow, you asked for someone to share, so i did : )