William Burkitt on John 17:7

Observe here, 1. The faithfulness of Christ in revealing the whole will of his Father to his disciples.

2. The proficiency of his disciples in the school of Christ: They knew all the things which Christ had told them; namely, that whatsoever he had, was given him of the Father, and that he had these things from him to be a mediator.

Learn hence, that Christ hath approved himself a faithful prophet to his church; a faithful messenger from his Father to his people, in that he hath added nothing to his message, nor taken nothing from it.

2. That it is our duty to know and believe on Christ, as the only messenger and mediator sent of God: Now they have known that all things whatsoever thou hast given me are of thee.