Trinity

A proper definition

Jesus is the Revealer of Himself as God, the Son, and of God, the Father, and God, the Holy Spirit.

The Council of Nicea provided a definitive interpretation of the Sacred Scriptures against the interpretation given by the Arians. The Athanasian Creed dates to that era and explores and explains the doctrine in detail.

Short definition

"Three persons in one God (one being, one entity)."