Straightaway, early in the book of Jeremiah, you find his characteristic reasoning with the people. How do we approach people in witness, in preaching? There is a tremendous variety of approaches in this book.
We can apply this to ourselves. Unlike Israel, we are a regenerate people. We look back on the real spiritual experiences of deliverance that correspond to Israel’s deliverance from slavery in Egypt. They were a typical people and all that happened to them was as a nation, pictured the spiritual experiences of the church. For us then, the words then become equivalent to ‘Nevertheless I have somewhat against thee, because thou hast left thy first love. 5 Remember therefore from whence thou art fallen, and repent, and do the first works’ (Revelation 2:4-5). What sweet fellowship we had with the Lord after our conversion! Don't you want to hold onto that? When you first came to Jesus Christ, and you repented of your sin, and you believed with all your heart in what he did for a sinner like you on Calvary's cross, and you pledged your life to him, and he heard your prayer, changed you, and gave you a new nature, a new character. He gave you spiritual life, and spiritual faculties, and you could pray and walk with him; you were so happy, and you loved him, and you trusted him, and you walked with him. Don't you want to go back to that if you have strayed from it, and hold it all the time, and have that absolute loyalty that you had at the beginning of your Christian walk? That is what we want: to hold onto loyalty to God and his word no matter what.
We have a big responsibility in witnessing, as well as in preaching, so to express things as to be heard. We must not express things so simply that we do so boringly, but we must strive to command attention and arouse interest. It should matter to us greatly that we are understood, and the preacher and teacher must watch for this. ‘Go and cry in the ears of Jerusalem.’ This is your responsibility, Jeremiah. Make sure people are listening to you, that you stir them and there is attention.