On LSD as well as shrooms. You never truly lose yourself or *become one* with the universe. If anything, you realize that you are the universe and the universe is you (check out my sig), in the same sense that your skin is the skin of the universe. It is the thing that envelops the universe from the inside out, and outside in, at the same time. The sense of individuality is still very prominent though. The only thing that you truly lose is your filters of perception that you use to judge your surroundings with.