John 17:2

As thou hast given Him power over all flesh. Because Thou, 0 Father, hast given Me power over all men, give Me also the glory which is necessary for its exercise and proportionate to it, that, as My Power is more ample over all men, so may My glory be most ample and be spread over all nations. Just as a viceroy says to a king, As thou hast given me this delegated power, give me also the agents and means which are necessary to sustain it. But the power of Christ is over all men, not merely as He is God, but as He is man. For the Father hath subjected all men to Christ as man, as their Prince and Saviour, and has committed them all to His care and guidance in order that He may, as far as possible, labour to save them all. He has therefore put the salvation of all men into His hands. "All flesh" then means that the preaching of the gospel should extend to the whole world, says S. Chrysostom.

That He should give eternal life to as many as thou hast given Him. That is, that I should rightly exercise the power entrusted to me, viz., that I should bring all men, as far as lies in me, to eternal life; for this knowledge of My glory, which is faith in Me, is necessary for their attaining salvation. But thou wilt say, Christ gives not eternal life to all men; few are saved, the many are lost. S. Chrysostom and Toletus reply, that Christ, for His part, gives eternal life to all, in giving His merits, His doctrine, His sacraments, His peace, and other means of salvation to all. And if they use them aright they will attain to eternal life. But because the many refuse to use them, it is by their own fault that more are lost than saved. Jansen adds that Christ more especially speaks of the predestinate only: for those did the Father give more especially to Christ (see below, ver. 16). Christ therefore gives His elect eternal life in an effectual manner, but to the reprobate merely sufficiently so that these may be saved possibly, but they only will be saved actually.