Since I would never deny the trinity, and the Son is a fundament of the Three, would that mean Jesus has surely always existed?
Jesus is God and man which God reconciled the world unto Himself in the person of Jesus Christ for He is God and man in harmony and all who follow Jesus having the Holy Spirit are in harmony with God.
Jesus is called God and as God has no beginning and is called the mighty God, and the Almighty, and is from everlasting, and God said there was no God formed before Him and there shall be no God formed after Him so Jesus cannot be a created God.
There is no such thing as a created God for God means supreme being and a creation cannot be a supreme being so Jesus is God that has no beginning.
But why would He be called a Son if He was not created and always existed.
According to Jesus as a man He is not the first man but Adam is the first man.
But Jesus is the beginning of creation, and the firstborn of the creatures although He was not born until 4000 years later so how can He be the beginning of creation which is according to His humanity.
That is because God call things that have not happened yet as though they already happened for if it is a plan of God to happen in the future it is the same as if it happened in the beginning for it will surely come to pass with no hinderance which the Bible says the Lamb was slain from the foundation of the world, and the prophets blood shed from the foundation of the world, and all the works were finished from the foundation of the world.
In the beginning was the Word which is the plan of God to come in flesh revealing Himself physically which the Bible is the word of God for He is revealing Himself by words in a book, and the Word is God revealing himself physically which the Bible says that no person has seen God but the Son revealed Him, and Jesus told Philip that if has seen Him then He has seen the Father.
The Word is the plan of God to come in the future in flesh.
In the beginning was the plan of God to come in the future in flesh, and that plan was with God before He laid down the foundation of the world, and the plan was God manifest in the flesh.
All things were created with the plan to come in the future in flesh, and without that plan God would of not created anything He created.
So all creation hinges on God coming in flesh as the Lord Jesus Christ and all the works were finished from the foundation of the world, so that is how the man Christ Jesus can be the beginning of creation, and the firstborn among the creatures even though He was not born until 4000 years later like the Lamb was slain from the foundation of the world even though it did not happen until 4000 years later.
For without the plan of God to come in the future in flesh He would of not created anything so Jesus is the first plan God had so He is the beginning of creation, and the reason creation is successful for Jesus will judge the angels and people.
Jesus as God has no beginning, but as a man is not the first man, but is the beginning of creation according to His humanity for He is the first plan of God, and had that plan before He started creation.