As a Christian I have made a decision defer to the authority of Jesus. This brings the question of why a person living today should follow the commands of Jesus, who walked on earth two thousand years ago. The reason is based on a few things that I know about who Jesus is. By knowing who He is, I know by what authority He commands me and other followers. Here is what I know.
Jesus is the son of God. He is part of God along with God the Father and the Holy Spirit. The Trinity-three in one. This means that He is God. The things he taught as "God in the Flesh" are the words of God. Therefore, I follow them. It would be foolish not to. The God of the universe, the creator of everything, who always has been and always will be, the all-knowing, all-powerful, author of existence itself. How can I begin to think that I know a better way to live than His way. His name is "I AM." His very existence explains everything else. It has taken me over 40 years to even begin to understand the smallest part of God's existence and even in that minuscule amount, I am dumbfounded and overwhelmed at His greatness. He has authority over all, because He is the author of all.
We are often wrapped up in the drama and details of our surrounding, that we neglect to step back and realize that in chasing our own goals, we are chasing our own tails. True fulfillment will come in fulfilling our part of the master design that the author of true reality has set in place. And so, by His authority, I will strive to find out who I am by continuing to try to know Him.