1 John 2:13-14 John refers to Jesus twice as the one who is from the beginning. And in John 1:1-3 he makes it clear that Jesus, the Word is God and has been from eternity.
Paul tells the Colossians in 1:18 that he is our beginning in a spiritual sense because he is the firstborn from the dead, in other words, his resurrection will make ours possible.
In so many ways he is the beginning. He is the beginning for the church and the new law. He is the beginning of all physical life and all spiritual life and hope for eternal life.
On the other hand, he is the end in so many ways. He brought an end to the power of death. He brought an end to Satan’s power. Romans 10:4 tells us Christ is the end of the law (the Law of Moses) for all who believe. He is or will be the end to this world as well when the time comes according to 1 Corinthians 15:24 at that time Christ will end his reign and return the kingdom to the Father.
Christ is without a doubt both beginning and end in these ways and many other ways that we don’t understand or know about. He can end your old way of life and give you a new life of righteousness. Is Christ your beginning? Is Christ your end?