And I will come down and talk with you there: and I will take some of the spirit which is upon you, and will put it upon them; and they shall bear the burden of the people with you, that you bear it not yourself alone.
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Augustine of Hippo
The same meaning is to be understood in the case of Moses when the Lord said to him, “I will take of your spirit and give to them,” that is, I will give to them of the Holy Spirit which I have already given to you. If that which is also given has the giver for its principle, because it did not receive from any other source than that which proceeds from him, then we have to confess that the Father and the Son are the principle of the Holy Spirit, not two principles. But as the Father and the Son are one God, and in relation to the creature are one Creator and one Lord, so they are one principle in relation to the Holy Spirit. But in relation to the creature, the Father, the Son and the Holy Spirit are one principle, as they are one Creator and one Lord. .
Thy spirit. St. Augustine (q. 18,) reads "of the spirit which is on thee "(Septuagint) referring it to the indivisible spirit of God, so that these ancients received what was sufficient for them, while Moses suffered no diminution. Thus one lamp communicates light to another, without being impaired. (Origen, hom. vi.) Theodoret (q. 18,) also adds, that a person confers baptism on thousands, and yet loses no part of the grace himself. Selden (Syn. ii. 4,) shows that the Jews explain this spirit of a certain emanation of divine light, or inspiration, which causes the prophets to speak. They have not in general, a distinct belief of the blessed Trinity. "I will make an increase of the spirit, which is upon thee, and will place it upon them. "(Chaldean; ver. 25.)