Church Fathers on John 17:26

After He has said that many should believe on Him through them, and that they should obtain great glory, He then speaks of the crowns in store for them; Father, 1 will that they also whom you have given Me, be with Me; where I am.

These are they whom He has received from the Father, whom He also chose out of the world; as He says at the beginning of this prayer, you have given Him power over all flesh, i.e. all mankind, That He should give eternal life to as many as you have given Him. Wherein He shows that He had received power over all men, to deliver whom He would and to condemn whom He would. Wherefore it is to all His members that He promises this reward, that where He is they may be also. Nor can…

What means then what the Truth says above, No man has ascended into heaven, but He that came down from heaven, even the Son of man which is in heaven. Yet here is no discrepancy for our Lord being the Head of His members, the reprobates excluded, He is alone with us. And therefore, we making one with Him, whence He came alone in Himself, there; He returns alone in us.