The most widely misunderstood part of the doctrine of Christianity is the Trinity. Most non-Christians (especially Moslems) consider that we worship three gods - The Father, The Son, and the Holy Spirit. This is incorrect and should not be taken lightly by the church.
It is very clear that the basis of Trinity of one of the most important fundamentals of the church of Christ. Trinity is a Greek for "three united". The triune nature of God is clearly given both in the Old and New Testaments of the Bible. In the Old Testament the plural word "Elohim" is used mostly for the Godhead. First of all let me clear the misconception of the Trinity meaning three gods. It's clear that Christians worship one God. But we proclaim the threefold nature of God. The Father, The Son, and The Holy Spirit. All three parts of the Trinity play a vital role in the salvation of mankind. The Father is the Creator of heaven and earth. The Son is the Redeemer of man. The Holy Spirit is the Comforter of the church. All three are God and all three are One. They may be three distinct personalities but they are part of the same and only Godhead. This is one of the main reasons why Jesus commanded us to be baptized in the name of the Trinity.
Denominations like the Jehovah's Witnesses claim that Trinity is not biblical. If that were so then the Bible would be full of contradictions. Here is one vivid example of the Trinity found in Matthew ch. 3:
16 And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him:
17 And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased.
It is because of God's pure and holy love for us that He has chosen to reveal through His Son one of the greatest mysteries that had been concealed from wise men throughout the ages.