19. Yet a little while. He continues the commendation of special grace, which ought to have been sufficient for alleviating, and even for removing the grief of the disciples. "When I shall have withdrawn," says he, "from the view of the world: still I shall be present with you." That we may enjoy this secret beholding of Christ, we must not judge of his presence or his absence according to carnal perception, but we must earnestly employ the eyes of faith for contemplating his power. Thus believers always have Christ present by his Spirit, and behold him, though they be distant from him in body.

Because I live. This statement may be explained in two ways. Either it may be viewed as a confirmation of the former clause, because I live, and you shall live; or, it may be read separately, because I live, you also shall live; and then the meaning will be, that believers will live, because Christ liveth. I willingly embrace the former opinion, and yet we may draw from it the other doctrine, that the life of Christ is the cause of our life. He begins by pointing out the cause of the difference, why he shall be seen by his disciples, and not by the world. It isn't because Christ cannot be seen but according to the spiritual life, of which the world is deprived. The world seeth not Christ; this is not wonderful, for the death of blindness is the cause; but as soon as any man begins to live by the Spirit, he is immediately endued with eyes to see Christ. Now, the reason of this is, that our life is closely connected with the life of Christ, and proceeds from it as from its source; for we are dead in ourselves, and the life with which we flatter ourselves is a very bad death. Accordingly, when the question is, how we are to obtain life, our eyes must be directed to Christ, and his life must be conveyed to us by faith, that our consciences may be fully convinced, that, so long as Christ lives, we are free from all danger of destruction; for it is an undoubted truth, that his life would be nothing, when his members were dead.

20. At that day. Some refer this to the day of Pentecost; but it rather denotes the uninterrupted course, as it were, of a single day, from the time when Christ exerted the power of his Spirit till the last resurrection. From that time they began to know, but it was a sort of feeble beginning, because the Spirit had not yet wrought so powerfully in them. For the object of these words is, to show that we cannot, by indolent speculation, know what is the sacred and mystical union between us and him, and again, between him and the Father; but that the only way of knowing it is, when he diffuses his life in us by the secret efficacy of the Spirit; and this is the trial of faith, which I lately mentioned.

As to the manner in which this passage was formerly abused by the Aryans, to prove that Christ is God only by participation and by grace, it is easy to refute their sophistry. For Christ does not speak merely of his eternal essence, but of that Divine power which was manifested in him. As the Father has laid up in the Son all fullness of blessings, so, on the other hand, the Son has conveyed himself entirely into us. He is said to be in us, because he plainly shows, by the efficacy of his Spirit, that he is the Author and the cause of our life.