I liked this comment too.
Another attribute of the mystical experience that lends itself to egotism is the overwhelming sense, feeling, or perception that one is experiencing things in a way that is primal — e.g. more real or truer than how one normally experiences things. The notion one has “seen the truth” is, once again, fertile grounds for egotism.
So the mystical experience — or at least it’s aftertaste — does not come without challenges. It is of course up to the individual how they deal with those challenges.