Jesus wanted his disciple not to forget the things he had made and not to bow down on wrong teachings... He wanted us to focus on his teachings and understand the right thing...

No need to give me sign because it is already written in the Gospel that Jesus is the son of God and do Godly things yesterday, today and even in the time of His return... Jesus had made me new again,,, His works in my heart had made myself to see things into a different life perspective,,, that worldly life is nothing without  Him as our savior...