The Trinity is a concept that is unique to Christianity. No other faith, religion, sect, belief system, or philosophy advocating one God also declares that there are three who are God.
This does not mean there are three gods in one person, but that one God exists as three persons, each being co-equal, co-infinite, and co-eternal with all three possessing the same essential nature or essence, Ps. 110:1; John 10:30.
Ps 110:1 A Psalm of David. The LORD said unto my Lord,
John 10:30 I and my Father are one.
The Trinity defines the unity of God as having one divine nature with specific and describable attributes. However, each member of the Godhead, God the Father, God the Son, and God the Holy Spirit, is a separate person who possesses these attributes individually. No one member of the Trinity, in His essential being, is subordinate to another member, Matt. 28:19.
Mt 28:19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Spirit
Isa. 48:16 Come [Israel] near to Me, listen to this: from the first I have not spoken in secret, from the time it took place, I was there. And now the Lord God [Father] has, sent Me [Son], and His Spirit [Spirit].
Each person of the Godhead has a purpose related to the eternal will and plan of God. The Scripture ascribes to each person distinct roles not jointly shared by the Trinity. The Father is the planner, the source of all things. The Son is the agent through whom the Father’s plan is enacted. The Holy Spirit is the revealer and empowers the plan in our lives.
There is a practical reason for every believer in Jesus Christ to fully comprehend the principle of the Trinity.
Our view of the Trinity determines our understanding of Christology, the person and work of Jesus Christ.
Our view of the Holy Spirit affects our concept of living the Christian life.
Our worship and spirituality are made possible only with a biblical perspective of the Godhead.
In short, we must understand the Trinity to have a maturing relationship with God.