Then said Jesus to them again, Peace be unto you: as my Father hath sent me, even so send I you.
Then said Jesus to them again - now that they were not only calmed, but prepared to listen to Him in a new character.
Peace be unto you. The reiteration of these precious words shows that this was what He designed to be not only the fundamental but ever-present, ever-conscious possession of His people.
As my Father (rather, 'the Father') hath sent me, even so send I you - or rather, perhaps, 'even so am I sending you,' that is, just about to do it. (See the note at John 17:18.)