The Trinity.

Father, Son and Holy Ghost I was taught as a child. All Co-Equal.

Some random thoughts on it now at 82.

Portrayal in art: The Father ( God) old, white bearded. Thoughts of the Cistine Chapel. Very similiar to the depiction of Zeus in Greek mythology.

The Son ( Jesus). Frail, contemplative, bearded, under control, apart from the Temple visit with the money lenders.

The Holy Ghost, or as the politically correct call it "The Holy Spirit." This to me is the fascinating one. Inside us upon baptism I believe. No human form. Usually depicted as a dove. If blasphemy against, the unforgivable sin.