Romans 3:22-24 the righteousness of God through faith in Jesus Christ for all who believe. For there is no distinction: for all have sinned and fall short of the glory of God, and are justified by his grace as a gift, through the redemption that is in Christ Jesus,
Some may ask, “Why is the Trinity so important to Christian belief?”. Why, for instance, can’t I just believe in God and leave it at that? Why do I need to know that God is Three in One? This is a valid question and it really has more than one answer.
Without the Trinity, we lose the Gospel. Man is sinful and God’s wrath (The Father’s) is upon us. Jesus, the Son, comes to earth to take the sins of man upon Himself and imputes His righteousness on to those who believe on Him. This brings reconciliation with the Father. Upon His departure back to the Father’s side, the Holy Spirit is given to the regenerate Christian to empower him or her to live out God’s will. If we lose any part of this plan, we lose all of it. Each person of the Trinity plays His role in the redemption of man. No Trinity, no salvation and no right relationship with God.
Without the Trinity, the Bible makes little sense. Some Christians believe in something called Modalism, where God is one, but acts in different modes at different times. The Father created the world. Jesus was the manifestation of God as a man on earth. The Holy Spirit is active today in the lives of Christians. In Modalism, God does not exist as three persons simultaneously. But then, why did Jesus come to pay the price of man’s sins to satisfy the wrath of God? How then did God the Father speak from heaven as Jesus was baptized and the Holy Spirit descend on Him like a dove? It’s a stretch to makes sense of such things.
The reasoning goes on, but what every Christian needs to understand about the Trinity is that God is real right now in your life and is capable of acting in any capacity necessary. God our Father, Jesus our Mediator, and Holy Spirit our Helper. They are Three and they are One.