Augustine of Hippo
Catena Aurea · Johannesevangelium 7
In the last day, that great day of the feast, Jesus stood and cried, saying, If any man thirst, let him come unto me, and drink. He that believeth on me, as the Scripture hath said, out of his belly shall flow rivers of living water. (But this spake he of the Spirit, which they that believe on him should receive: for the Holy Ghost was not yet given; because that Jesus was not yet glorified.)
If the Holy Spirit then is received now, why is there no one who speaks the tongues of all nations? Because now the Church herself speaks the tongues of all nations. Whoso is not in her, neither doth he now receive the Holy Spirit. But if only thou lovest unity, whoever hath any thing in her, hath it forthee. Put away envy, and that which I have is thine. Envy separateth, love unites: have it, and thou hast all things: whereas without it nothing that thou canst have, will profit thee. The love of God is shed abroad in our hearts by the Holy Spirit which is given to us. (Rom. 5:9) But why did our Lord give the Holy Spirit after His resurrection? That the flame of love might mount upwards to our own resurrection: separating us from the world, and devoting us wholly to God. He who said, He that believeth in Me, out of his belly shall flow rivers of living water, hath promised life eternal, free from all fear, and change, and death. Such then being the gifts which He promised to those in whom the Holy Spirit kindled the flame of love, He would not give that Spirit till He was glorified: in order that in His own person He might shew us that life, which we hope to attain to in the resurrection.