On 1 Jn 2.18-27
"CHILDREN, it is the last hour." In this reading he speaks to them as children that they may hasten to grow because it is the last hour. The body's age does not lie in the will. Thus no one grows in the flesh when he wills it, just as no one is born when he wills it. But where birth lies in the will, growth also lies in the will. No one is born of water and the Spirit1. except one willing. Therefore, if he wills, he increases in growth; if he wills, he decreases. What is to increase in growth? To make progress. What is to decrease? To retrogress. Whoever knows that he has been born, let him hear that he is a child and an infant; let him eagerly crave his mother's breasts, and he grows quickly. Now his mother is the Church, and her breasts are the two testaments of the sacred Scriptures. From this let the milk of all mysteries be sucked that have been accomplished in time for our eternal salvation, in order that, nourished and strengthened, one may come to eating the solid food which is, "In the beginning was the Word and the Word was with God and the Word was God."2. Our milk is Christ in his humility; our solid food3. is the very same Christ, equal to the Father. With milk he nourishes you that he may feed you with bread, for to touch Jesus spiritually with the heart, this is to know that he is equal to the Father.
2. For this reason he also forbade Mary to touch him and said to her, "Do not touch me, for I have not yet ascended to the Father."4. What is this? Did he offer himself to the disciples____________________
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Publication information: Book title: Tractates on the Gospel of John. Volume: 5. Contributors: Augustine - Author, John W. Rettig - Translator. Publisher: Catholic University of America Press. Place of publication: Washington, DC. Publication year: 1988. Page number: 159.