Some people experience anxiety, pain, and psychosis, sometimes for long durations. If you want to dig deeper into this, do a web search for “meditation adverse effects” and you’ll find a good bit of peer reviewed work in good quality journals.

I love meditation and it’s a major help in my life, but I can’t go around telling everyone it’s for them, because data suggests it’s definitely not for everyone! It seems to help most people though. Everyone’s gotta know for themselves.