What does it mean that God is one God in three persons?

The doctrine that God is one God in three persons is foundational to Christian belief and is expressed in the Trinity. This mystery teaches that the Father, Son, and Holy Spirit are distinct yet united in essence, sharing the same divine nature. The concept is illustrated in Genesis 1:26, where God speaks in plurality, and during Jesus' baptism (Matthew 3:16-17), the presence of all three persons is evident. This understanding helps believers recognize the full scope of God's nature, which embodies complete equality, unity, and diversity. Importantly, this relationship models the principles of submission and love as each person willingly submits to the other without loss of individuality or equality, providing a framework for human relationships grounded in mutual respect and love.