³⁷ 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. ³⁸ He that believeth on me, as the scripture hath said, out of his belly shall flow rivers of living water. ³⁹ (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.) ⁴⁰ Many of the people therefore, when they heard this saying, said, Of a truth this is the Prophet.
–John 7:37-40 (KJV)–

³ For I will pour water upon him that is thirsty, and floods upon the dry ground: I will pour my Spirit upon thy seed, and my blessing upon thine offspring: ⁴ And they shall spring up as among the grass, as willows by the water courses.
–Isaiah 44:3-4 (KJV)–

Except a man be born of water and of the Spirit,
he cannot enter into the kingdom of God.
–John 3:5 (KJV)–

The evangelist explained, as I have said, whereof the Lord had cried out, to what kind of drink He had invited, what He had procured for them that drink, saying, But this spoke He of the Spirit, which they that believe in Him should receive: for the Spirit was not yet given, because Jesus was not yet glorified. What spirit does He speak of, if not the Holy Spirit?…But on receiving the Spirit of God, we learn also what takes place in God: not the whole, for we have not received the whole. We know many things from the pledge; for we have received a pledge, and the fullness of this pledge shall be given hereafter. Meanwhile, let the pledge console us in our pilgrimage here; because he who has condescended to bind himself to us by a pledge, is prepared to give us much. If such is the token, what must that be of which it is the token?
—Augustine—

—

James and Michal Ann Goll, God Encounters (Destiny Image, 1998), p. 32.

Richard J. Foster, Streams of Living Water (HarperCollins, 1998).