To believe there is a God other than Jesus is to deny Jesus as MightyGod and EverlastingFather.
Please speak and pray in the name of Jesus as He has all power in heaven and earth Mat 28:18 as saviour Phi 3:20 healer 1Pe 2:24 lord and king Rev 17:14.
Our LordJesusChrist does not want us to be troubled about anything. Worry, fear and stress are aspects of being troubled. Jesus often told the disciples to fear not, pronouncing good cheer, peace and joy upon them.
This aspect of His message helped to reveal the Truth about the mysterious Creator God.
The disciples (and most people) believe in the Creator. Their understanding of Him came from the OldTestament wherein the Lord was presented as stern and difficult to approach. Here Jesus tells the disciples to believe in His representation of the Creator.
Those who believe in a representation or idea about the Creator but not Christ Jesus miss the mark. They have not seen the light and Truth about our Creator and so miss out on salvation which includes EternalLife and AbundantLife.
The HolySpirit of Christ Jesus is the Creator by the Word of Christ Jesus and He comes into the lives of those who receive Christ Jesus as His express image - the only correct representation and characterization of the HolySpirit.
Jesus is the proof of our HolySpiritFather, and He is the door into His love and Grace.