Are mystical experiences delusional? How would you know?
For the purposes of this thread, a mystical experience is an experience in which subject/object perception comes to an end while experiencing remains.
BONUS QUESTION: Is normal, non-mystical experiencing delusional? How would you know?
Mystical experiences in themselves are definitely not delusional, but when normal consciousness returns and the subject believes it was they who had the experience, then that is delusional, but its a delusion due to ignorance, and not that an awesome cosmic event beyond the ken of the mortal mind didn't transpire.
Many posters here at RF including this one report having had a mystical experience, but speaking for myself, on the first occasion I did initially sincerely believe it was I (subject) who had the experience. Fortunately an advanced disciple who understood what had occurred rebuked me for my presumption that it was the self same 'I' present during the mystical experience that later was explaining to others of 'my' mystical experience. Even then I did not understand no matter how much I tried to, as to why it was not I who experienced it. To set me in the right direction, I was asked to have as the highest priority in my life to find out who I am. but also that before I could truly ask that question in earnest, I must first find out what I am.
The original mystical experience occurred when I was 36 years of age and I am now 66, and so after this time I am prepared to say is yes, IMHO the normal reality as perceived by myself through a subject-object 3D space/time relationship framework is definitely delusional
relative to the mystical non-dual 'glimpses' of Grace.
Though this last point is most probably superfluous for the astute posters of this thread, please do understand that it is understood that the veracity of this statement can never be proven to another for the reason that requirement for proof is an integral part of the cosmic nether region's subject/object dualistic consciousness where the mortal mind finds delight in the continuation of 'eating' of the pablum of the tree of knowledge of good and evil.