John17:21
Translation
that all may be one, as you, Father, are in me and I in you, that they also may be in us, so that the world may believe that you have sent me.
Paraphrase
that all of these may be united in one purpose and in full agreement, in the same way that you, Father, are functioning through me and represented in me because we are completely united, and I am in full agreement with you because we are perfectly united in our cause. Our purpose is for our perfect unity to cause them to become fully united with us in our cause, then the world will be challenged to believe that I came as your emissary to show them what you are like.