Thank you for your admission that your belief in the "new testement" rests on absolutely nothing.
May it be His Will that you one day see the errors in this and acknowledge the true and pure Word of G-d.
I said I cannot help you with your unbelief. The Truth of Jesus, Who He IS, has built great faith in Him as Messiah, my Savior, and brought me into the 'Body of Christ', which concept is impossible to comprehend without His Holy Spirit teaching the regenerate human spirit, raising one up in the way that they should go.
I take it then that you do not want a Physics explanation for what Jesus taught His disciples recorded in John 14 under guidance of The Holy Spirit of GOD?
The New testament is the recorded fulfillment of the Old Testament prophecies about the Messiah.
The entire OT points towards Jesus. The NT shows where that was fulfilled and what is coming after and how NT saints are to live.