Is the Trinity Biblical?

Christianity is in crisis. While many statistical sources on this subject are debated, many concur that Christianity, currently the world's largest religion, is being outpaced by the growth of Islam in third world countries. Many have speculated about the reasons why Christianity has failed to grow at the same pace as Islam, with varying levels of acceptance by each religion's adherents. As a result, many Christian leaders take this tapering of growth to be a sign of steps away from "orthodoxy", or "right belief", and have called for its followers to return to the assumed roots of the Christian faith as a means of renewal: the Nicene Creed.

The Nicene Creed is considered by most Christians to be the foundational set of beliefs that define what it is to be a Christian. Even many Christians from churches that do not utilize creeds as a regular part of worship adhere to all of the creed's stated beliefs. And no portion of the creed figures more prominently in Christian belief or history than the statements related to the Trinity. But since many church leaders of varying denominations have called Christians to return to the creedal confession that includes the Trinity, several questions arise. What is the Trinity? Is the Trinity in the Bible? Is it possible to believe in one God and in the Trinity?

The first thing that needs to be understood is what the Trinity is. The Trinity is the belief that God is one Being, comprised of three, indivisible, and equal Persons that all share fully in the Divine nature. These three Persons are God the Father, God the Son (Jesus Christ), and God the Holy Spirit. About God the Father, the Nicene Creed says,

"We believe in one God,
the Father, the Almighty,
maker of heaven and earth,
of all that is, seen and unseen."

About Jesus Christ, the creed says,

"We believe in one Lord, Jesus Christ,
the only Son of God,
eternally begotten of the Father,
God from God, Light from Light,
true God from true God,
begotten, not made,
of one Being with the Father."