3. And since many saints participate in the Holy Spirit, He cannot therefore be understood to be a body, which being divided into corporeal parts, is partaken of by each one of the saints; but He is manifestly a sanctifying power, in which all are said to have a share who have deserved to be sanctified by His grace. And in order that what we say may be more easily understood, let us take an illustration from things very dissimilar. There are many persons who take a part in the science[26] or art of medicine: are we therefore to suppose that those who do so take to themselves the particles of some body called medicine, which is placed before them, and in this way participate in the same? Or must we not rather understand that all who with quick and trained minds come to understand the art and discipline itself, may be said to be partakers of the art of healing? But these are not to be deemed altogether parallel instances in a comparison of medicine to the Holy Spirit, as they have been adduced only to establish that that is not necessarily to be considered a body, a share in which is possessed by many individuals. For the Holy Spirit differs widely from the method or science of medicine, in respect that the Holy Spirit is an intellectual existence,[27] and subsists and exists in a peculiar manner, whereas medicine is not at all of that nature. 4. But we must pass on to the language of the Gospel itself, in which it is declared that “God is a Spirit,” and where we have to show how that is to be understood agreeably to what we have stated. For let us inquire on what occasion these words were spoken by the Saviour, before whom He uttered them, and what was the subject of investigation. We find, without any doubt, that He spoke these words to the Samaritan woman, saying to her, who thought, agreeably to the Samaritan view, that God ought to be worshipped on Mount Gerizim, that “God is a Spirit.” For the Samaritan woman, believing Him to be a Jew, was inquiring of Him whether God ought to be worshipped in Jerusalem or on this mountain; and her words were, “All our fathers worshipped on this mountain, and ye say that in Jerusalem is the place where we ought to worship.”[28] To this opinion of the Samaritan woman, therefore, who imagined that God was less rightly or duly worshipped, according to the privileges of the different localities, either by the Jews in Jerusalem or by the Samaritans on Mount Gerizim, the Saviour answered that he who would follow the Lord must lay aside all preference for particular places, and thus expressed Himself: “The hour is coming when neither in Jerusalem nor on this mountain shall the true worshippers worship the Father. God is a Spirit, and they who worship Him must worship Him in spirit and in truth.”[29] And observe how logically He has joined together the spirit and the truth: He called God a Spirit, that He might distinguish Him from bodies; and He named Him the truth, to distinguish Him from a shadow or an image.