that they may all be one — as you, Father, are in me and I am in you — that they too may be in us, so that the world may believe that you sent me.
In context
19And for their sake I make myself holy, so that they too may be made holy in truth. 20I am not praying only for these. I pray also for those who will believe in me through their word, 21that they may all be one — as you, Father, are in me and I am in you — that they too may be in us, so that the world may believe that you sent me. 22I have given them the glory you gave me, so that they may be one as we are one: 23I in them and you in me, so that they may be brought to complete unity, and the world may know that you sent me, and that you loved them as you loved me.