Answer:

The term “Son” in our modern lingo means you are the younger version of. Jesus was/is God from all eternity. He’s not younger than anyone. He wasn’t born in any true ‘became real’ sense like our babies that suddenly show up from nothingness. So, in what sense is Jesus the ‘Son’ of God? Jesus is the ‘Son’ of God because he was born into this world through Mary by the hand of the Father and the presence of the Holy Spirit. ‘Son’ in Biblical terms means to ‘come from.’ In the Bible, Jewish genealogies call people ‘son of’ when they mean grandson or great-grandson because the person eventually ‘came from’ that guy. Since the 2nd Person of the Trinity is the WORD (logos) and God spoke in Creation (all things made through Christ and for Christ), that word/logos emanated and ‘came from’ God. Jesus ‘came from’ God, so he was called ‘Son.’

Why is Jesus the ‘emanating one’ or the Son? Why Jesus is the ‘emanating one’ or the Son is a mystery to us. God is ONE and SPIRIT, but also three persons: Father, Son & Holy Spirit. I know the three Persons of God are all unique, but I don’t know why they got assigned the roles they did.