Now they have known... — Better, Now they do know. The word means “They have come to know, and do know.” (Comp. Note on John 16:30.) This is the result of their spiritual training — in its fulness, indeed, still future, but regarded as in the immediate present.
All things whatsoever thou hast given me are of thee. — We ought to assign no limit to the extent of these words. The lesson He had been teaching them, and which they were about fully to know, was that the whole life of Christ — the words He had spoken (John 12:49), the works He had done (John 5:36) — was a manifestation of the Father.