“There now, with that you have David’s rules. If you study hard in accord with his example, then you will also sing and boast with him in the Psalm, ‘The law of thy mouth is better to me than thousands of gold and silver pieces’ (Ps. 119:72). Also, ‘Thy commandment makes me wiser than my enemies, for it is ever with me. I have more understanding than all my teachers, for thy testimonies are my meditation. I understand more than the aged, for I keep thy precepts’ (Ps. 119:98-100). And it will be your experience that the books of the fathers will taste stale and putrid to you in comparison.
You will not only despise the books written by adversaries, but the longer you write and teach the less you will be pleased with yourself. When you have reached this point, then do not be afraid to hope that you have begun to become a real theologian, who can teach not only the young and imperfect Christians, but also the maturing and perfect ones. For indeed, Christ’s church has all kinds of Christians in it who are young, old, weak, healthy, strong, energetic, lazy, simple, wise, etc.
If, however, you feel and are inclined to think you have made it, flattering yourself with your own little books, teaching, or writing, because you have done it beautifully and preached excellently; if you are highly pleased when someone praises you in the presence of others; if you perhaps look for praise, and would sulk or quit what you are doing if you did not get it– if you are of that stripe, dear friend, then take yourself by the ears, and if you do this in the right way you will find a beautiful pair of big, long, shaggy donkey ears.
Then do not spare any expense! Decorate them with golden bells, so that people will be able to hear you wherever you go, point their fingers at you, and say, ‘See, see! There goes that clever beast, who can write such exquisite books and preach so remarkably well.’ That very moment you will be blessed and blessed beyond measure in the kingdom of heaven. Yes, in that heaven where hellfire is ready for the devil and his angels. To sum up: Let us be proud and seek honor in the places where we can. But in this Book the honor is God’s alone, as it is said, ‘God opposes the proud, but gives grace to the humble’ (1 Pet. 5:5); to whom be glory, world without end, Amen.”
–Martin Luther, “Preface to the Wittenberg Edition of Luther’s German Writings,” Martin Luther’s Basic Theological Writings, Ed. Timothy Lull. (Minneapolis: Fortress Press, 1989), pp. 67-68.