John testified, saying, "I have seen the Spirit descending like a dove out of heaven, and it remained on him.
It was then, for the first time, that the Spirit was seen descending on him; not that he had formerly been destitute of him, but because he might be said to be then consecrated by a solemn rite. For we know that he remained in concealment, during thirty years, like a private individual, because the time for his manifestation was not yet come; but when he intended to make himself known to the world, he began with his baptism. At that time, therefore, he received the Spirit not only for himself, but for his people; and on that account his descent was visible, that we may know that there dwells in him an abundance of all gifts of which we are empty and destitute. This may easily be inferred from the words of the Baptist; for when he says, Upon whom thou shalt see the Spirit descending, and remaining on him, it is he who baptizeth with the Spirit, his meaning is, that the reason why the Spirit was beheld in a visible form, and remained on Christ, was, that he might water all his people with his fullness. What it is to baptize with the Spirit I have already noticed in a few words; namely, that he imparts its efficacy to baptism, that it may not be vain or useless, and this he accomplishes by the power of his Spirit. 