The best texts read γὰρ, for. There is a logical connection between the last sentence and the following. The Father's will in preserving and raising up that which he has given to the Son, includes in its fulfillment the believing contemplation of the Son and its issue in eternal life.
Of Him that sent me
The best texts substitute πατρός, you, of my Father.
Seeth (θεωρῶν)
The word is designedly used. The saving vision of Christ is not here seeing, but earnest contemplation. Rev., beholdeth. See on Joh 1:18. Compare ye have seen me, and believe not (Joh 6:36).