The apostle [Paul] says: “Persist with reading!” (1 Timothy 4:13) Therefore it is necessary to read, and diligently, regularly read [Scripture], and read everything that is written, all the Scriptures from beginning to end, and read what is read again and again so that one, when one is finished with the Bible, immediately goes back to the beginning. Joshua, the leader of Israel who was at the same time to teach the people the ways of the Lord, had the command of God: “Let the Book of the Law not depart from your mouth, but contemplate it day and night!” (Joshua 1:8) This is also said to us. It is not enough when a pastor lets himself be satisfied with the daily lectionary, with which he as head of the household edifies his family in morning and evening prayers. No, servants of the Word, theologians, have the special command of God: “Persist with reading!” And if a preacher also is occupied from morning to evening for the work of the [preaching] office, then he should just not forget that reading, persistent reading is also an duty of the [preaching] office. Lack of time is no excuse. We should simply make the best use of our time. Even longer or shorter offical travels absolutely should not hinder “persistent” reading. Just as every Roman [Catholic] priest takes his Brevarium, so every evangelical preacher can take his New Testament with him on his travels. Every theologian should be versed in Scripture and be at home anywhere in it. About Luther it is praised that he has been a more excellent Localis, i.e., every saying in Scripture could be found immediately. Whoever diligently reads in many cases saves the trouble of pouring over concordances. A famous theologian of this [19th] century has testified about himself that he had not gained his knowledge of Scripture from many books and commentaries, but chiefly from the Scriptures themselves, from lectio continua.
Georg Stöckhardt, “On the Theologian’s Study of Scripture” (Vom Schriftstudium der Theologen). Translated by DMJ