Thing is, each person's experience of God is subjective and customized for that person.
Once I joined my grandma in a faith building seminar and during the blessing and prayer we all felt God's presence differently. My grandma felt a hand laid on her shoulder (I was beside her, nobody touched her), some experienced him as a cool breeze (windows were like 20 feet above us & doors were closed).

I experienced His presence as an intense heat but it wasn't painful. Reading the Bible and works of the Church fathers is fine but only though a relationship with God will most questions be answered and mysteries revealed.