There’s a reason why marijuana and creativity are so intertwined, and it has to do with spirituality. There’s a reason it’s called getting high, and it has nothing to do with being in a stupor. Getting high means going outside of your ego – becoming greater than yourself. When you become greater than yourself, you are free to think new thoughts. You are open to creativity.
Marijuana, (and every other plant that gets you high) does exactly that. They reduce the brain’s ability to recognize ego – some more dramatically than others. They make you high. They make you more creative.
Warning: People who have taken large doses of the drug may experience an acute psychosis, which includes hallucinations, delusions, and a loss of the sense of personal identity. –DrugAbuse.gov
Do we need to stimulate these parts of our brains? Our history as a species suggests so. Especially since the other ways to do so are orgasm, meditation, and prayer. We’ve been doing that for ages as well.