It is beautiful to see how our Lord here credits the disciples with genuine grasp, both in heart and head, of His teaching. He had shortly before had to say, 'Have I been so long time with you, and yet hast thou not known Me?' and soon 'they all forsook Him and fled.' But beneath misconception and inadequate apprehension there lived faith and love; and He saw 'the full corn in the ear,' when only the green 'blade' was visible, pushing itself above the surface. We may take comfort from this generous estimate of imperfect disciples. If He did not tend, instead of quenching, 'dimly burning wicks,' where would He have 'lights in the world?'
Verse 6 lays down the beginning of discipleship as threefold: Christ's act in revealing; the Father's, in giving men to Jesus; and men's, in keeping the Father's word. 'Thy word' is the whole revelation by Christ, which is, as this Gospel so often repeats, not His own, but the Father's. These three facts underlying discipleship are pleas for the petition to follow; for unless the feeble disciples are 'kept' in the name, as in a fortress, Christ's work of revelation is neutralised, the Father's gift to Him made of none effect, and the incipient disciples will not 'keep' His word. The plea is, in effect, 'Forsake not the works of thine own hands'; and, like all Christ's prayers, it has a promise in its depths, since God does not begin what He will not finish; and it has a warning, too, that we cannot keep ourselves unless a stronger Hand keeps us.
Verses 7 and 8 carry on the portraiture of discipleship, and thence draw fresh pleas. The blessed result of accepting Christ's revelation is a knowledge, built on happy experience, and, like the acquaintance of heart with heart, issuing in the firm conviction that Christ's words and deeds are from God. Why does He say, 'All things whatsoever Thou hast given,' instead of simply 'that I have' or 'declare'? Probably it is the natural expression of His consciousness, the lowly utterance of His obedience, claiming nothing as His own, and yet claiming all, while the subsequent clause 'are of Thee' expresses the disciples' conviction. In like fashion our Lord, in verse 8, declares that His words, in their manifoldness (contrast v. 6, 'Thy word'), were all received by Him from the Father, and accepted by the disciples, with the result that they came, as before, to 'know' by inward acquaintance with Him as a person, and so to have the divinity of His Person certified by experience, and further came to 'believe' that God had sent Him, which was a conviction arrived at by faith. So knowledge, which is personal experience and acquaintance, and faith, which rises to the heights of the Father's purpose, come from the humble acceptance of the Christ declaring the Father's name. First faith, then knowledge, and then a fuller faith built on it, and that faith in its turn passing into knowledge (v. 25)--these are the blessings belonging to the growth of true discipleship, and are discerned by the loving eye of Jesus in very imperfect followers.
In verse 9 Jesus assumes the great office of Intercessor. 'I pray for them' is not so much prayer as His solemn presentation of Himself before the Father as the High-priest of His people. It marks an epoch in His work. The task of bringing God to man is substantially complete. That of bringing men by supplication to God is now to begin. It is the revelation of the permanent office of the departed Lord. Moses on the Mount holds up the rod, and Israel prevails (Exod. xvii. 9). The limitation of this prayer to the disciples applies only to the special occasion, and has no bearing on the sweep of His redeeming purpose or the desires of His all-pitying heart. The reasons for His intercession follow in verses 9-11a. The disciples are the Father's, and continue so even when 'given' to Christ, in accordance with the community of possession, which oneness of nature and perfectness of love establish between the Father and the Son. God cannot but care for those who are His. The Son cannot but pray for those who are His. Their having recognised Him for what He was binds Him to pray for them. He is glorified in disciples, and if we show forth His character, He will be our Advocate. The last reason for His prayer is the loneliness of the disciples and their exposure in the world without Him. His departure impelled Him to Intercede, both as being a leaving them defenceless and as being an entrance into the heavenly state of communion with the Father.