Theophany definition: appearance of God — of a deity to a human.
This closest experience (and not the only one of my life) immediately comes to mind: praying so hard that I connected spiritually. Peace and serenity washed over me and came to me without a word. I knew I had been understood and I felt the Holy Spirit of God within me. So very calming and peaceful to my soul. I experienced this theophany within the first months after leaving home @ 18 years old in 1978. While in that basement when I felt so alone, God filled me, and I no longer felt alone!
What a glorious and gracious memory!!!