An addition to the BHT, where Paul (or a disciple of Paul) talks about the infinite Grace that Christ is found in all beings, and the type of wondrous insight and knowledge that God reveals in those who attain the consciousness of Christ.
I see mysticism in Joseph Smith and his work at nearly every turn. Joseph united his mind and consciousness in God to such a great degree that he spoke with the voice of Christ. One only does that if one is genuinely in mystical union with God, or delusional, or a con man (a fake). I perceive Joseph was the first, and I'll share a few reasons why.