In this video, Dr. Charles Blackstock addresses whether we serve one God with three parts or three gods as one. He explains that the doctrine of the Trinity, which, although the word "Trinity" does not appear in the Bible, is clearly talked about throughout scripture and that it refers to the belief that God is one God, but is manifested in three different persons: God the Father, God the Son, and God the Holy Spirit. He cites passages from Mark, Matthew, and 1 John as examples of how the Trinity is referenced in the Bible and emphasizes the importance of understanding the Trinity to fully understand God's nature and how he relates to us. He also explains how each of the three persons of the Trinity play distinct roles in our lives and how they help us to understand God.
