The Father, Son, and Holy Spirit are the three persons in one Godhead, also known as the Trinity. The Trinity is a central Christian doctrine that affirms the unity and diversity of God. The Father and the Son are related as a family, and the Holy Spirit is the love between them. However, this is only an analogy and does not fully capture the mystery of the Trinity. “God is said to be trinity in unity” The Trinity is a Christian doctrine that holds that God is one God, but three coeternal and consubstantial persons: the Father, the Son, and the Holy Spirit. The three persons are distinct, yet are one in substance, essence, or nature. The Trinity was present at the creation of the world and each person has a different role in the salvation of humans. The Trinity is a key belief of most Christians.