Sometimes it is easy to go back to our early days in the Christian faith. Back then everything was so simple. We believed in Jesus, everyone believed in Jesus, and life was simple. Of course, we then grow up and we learn more about the Scriptures, and we discover that Jesus is one with the Father, that He sends the Spirit, and then we hear the language of the Trinity. It’s in our confessions, our creeds, and in every Systematic theology. And then we learn that if we do not embrace the Trinity, we are not true Christians. But why can’t we just believe in Jesus, after all, He is the answer to every question we can’t answer?
It’s good to grow up; it’s hard to grow, but it is ultimately our goal. And part of growing up means we become more mature in the language of the Bible. We come to know that the Father is God, the Son is God, and the Spirit is God. The Jews and the Muslims criticize the doctrine of the Trinity by saying that any doctrine that cannot be reconciled logically is not true. How can there be Three Persons and One God? Thomas Jefferson expressed the frustrations of many when he said that the doctrine of the Trinity should be abandoned altogether:
“When we shall have done away with the incomprehensible jargon of the Trinitarian arithmetic, that three are one and one is three…when in short, we shall have unlearned everything, which has been taught since His day, and get back to the pure and simple doctrines he inculcated, we shall then be truly and worthily his disciples.”
Thomas Jefferson, of course, is part right and part wrong. “He was correct in the sense that Christians needs to focus on Jesus more,” but he was sadly mistaken that this would bring us back to simple doctrines and away from the Trinity. The reality is that at the precise moment we begin to focus on Jesus we are led directly to the doctrine of the Trinity. It was precisely through Jesus that the disciples knew the Trinity; it was precisely through Jesus that they learned that all authority has been given to Him! By Whom? The Father. Through Jesus they learned that the paraclete, the Spirit, would be sent after His ascension, and through Jesus they learned that the baptism of the nations, young and old, must be done not only in Jesus’ name, but into the Name, notice, not NAMES, but into the NAME=One God, Father, the Son, and the Spirit= Three Persons. God in Three Persons, blessed Trinity.
 Quoted in Darrel Johnson’s Experiencing the Trinity, pg. 12-13