Origen Ep ad Greg., 3

Do you then, sir, my son, study first of all the divine Scriptures. Study them I say. For we require to study the divine writings deeply, lest we should speak of them faster than we think; and while you study these divine works with a believing and God-pleasing intention, knock at that which is closed in them, and it shall be opened to thee by the porter, of whom Jesus says, “To him the porter openeth.” While you attend to this divine reading seek aright and with unwavering faith in God the hidden sense which is present in most passages of the divine Scriptures. And do not be content with knocking and seeking, for what is most necessary for understanding divine things is prayer, and in urging us to this the Saviour says not only, “Knock, and it shall be opened to you,” and “Seek, and ye shall find,” but also “Ask, and it shall be given you.” So much I have ventured on account of my fatherly love to you. Whether I have ventured well or not, God knows, and His Christ, and he who has part of the Spirit of God and the Spirit of Christ. May you partake in these; may you have an always increasing share of them, so that you may be able to say not only, “We are partakers of Christ,” but also “We are partakers of God.”