This is an article by Martin Luther, the great leader of the Reformation. This article is from his book, “The Bondage of the Will.” Here, he answers the Roman Catholic sophists who claimed that the Bible is a book of mystery which cannot be understood by the readers.
Vocabulary—perspicuity: clarity; recondite: obscure, hidden; sophists: a class of philosophers who argue intentionally, but fallaciously; Corycian Cavern: a deep hollow in rocks.
You divide Christian doctrines into two classes, and make out that we need to know the one but not the other. ‘Some,’ you say, ‘are recondite whereas others are quite plain.’ Surely at this point you are either playing tricks with someone else’s words, or practising a literary effect! However, you quote in your support Paul’s words in Romans 11, ‘O the depth of the riches both of the wisdom and knowledge of God!’ (v. 33); and also Isaiah 40: ‘Who hath directed the Spirit of the LORD, or being his counsellor hath taught him?’ (v. 13). It was all very easily said, either because you knew that you were writing, not just to Luther, but for the world at large, or else because you failed to consider that it was against Luther that you were writing! I hope you credit Luther with some little scholarship and judgment where the sacred text is concerned? If not, behold! I will wring the admission out of you! Here is my distinction (for too I am going to do a little lecturing - or chop a little logic should I say?): God and His Scripture are two things, just as the Creator and His creation are two things. Now, nobody questions that there is a great deal hid in God of which we know nothing. Christ Himself says of the last day. ‘But of that day and hour knoweth no man, no, not the angels of heaven, but my Father only’ (Matthew 24:36); and in Acts 1, he says: ‘It is not for you to know the times or the seasons’ (v. 7) and again he says: ‘I know whom I have chosen’ (John 13:18); and Paul says: ‘The Lord knoweth them that are his’ (2 Timothy 2:19); and the like. But the notion that in Scripture some things are recondite and all is not plain was spread by the godless Sophists (whom now you echo, Erasmus) - who have never yet cited a single item to prove their crazy view; nor can they. And Satan has used these unsubstantial spectres to scare men off reading the sacred text, and to destroy all sense of its value, so as to ensure that his own brand of poisonous philosophy reigns supreme in the church. I certainly grant that many passages in the Scriptures are obscure and hard to elucidate, but that is due, not to the exalted nature of their subject, but to our own linguistic and grammatical ignorance; and it does not in any way prevent our knowing all the contents of Scripture. For what solemn truth can the Scriptures still be concealing, now that the seals are broken, the stone rolled away from the door of the tomb, and that greatest of the mysteries brought to light - that Christ, God’s Son, became man, that God is Three in One, that Christ suffered for us, and will reign for ever? And are not these things known, and sung in our streets? Take Christ from the Scriptures - and what more will you find in them? You see, then, that the entire content of the Scriptures has now been brought to light, even though some passages which contain unknown words remain obscure. Thus it is unintelligent, and ungodly too, when you know that the contents of Scripture are as clear as can be, to pronounce them obscure on account of those few obscure words; if words are obscure in one place, they are clear in another. What God has so plainly declared to the world is in some part of the Scripture stated in plain words, while in other parts it still lies hidden under obscure words. But when something stands in broad daylight, and a mass of evidence for it is in broad daylight also, it does not matter whether there is any evidence for it in the dark. Who will maintain that the town fountain does not stand in the light because the people down some alley cannot see it, while everyone in the square can see it?
There is nothing, then, in your remark about the ‘Corycian cavern’; matters are not so in the Scriptures. The profoundest mysteries of the supreme Majesty are no more hidden away, but are now brought out of doors and displayed to public view. Christ has opened our understanding, that we might understand the Scriptures, and the Gospel is preached to every creature. ‘Their line is gone out through all the earth, and their words to the end of the world’ (Psalm 19:4). ‘All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness’ (2 Timothy 3:16). Come forward then, you, and all the Sophists with you, and cite a single mystery which is still obscure in the Scriptures. I know that to many people a great deal remains obscure; but that is due, not to any lack of clarity in Scripture, but to their own blindness and dullness, in that they make no effort to see truth which, in itself, could not be plainer. As Paul said of the Jews: ‘The veil is upon their heart’ (2 Corinthians 3:15) and again, ‘If our gospel be hid, it is hid to them that are lost: in whom the god of this world hath blinded the minds of them which believe not’ (2 Corinthians 4:3-4). They are like men who cover their eyes, or go from daylight into darkness, and hide there, and then blame the sun, or the darkness of the day, for their inability to see. So let the wretched men abjure that blasphemous perversity which would blame the darkness of their own heart on to the plain Scripture of God!
When you quote Paul’s statement (Romans 11:33?), ‘his judgments are incomprehensible’, you seem to take the pronoun ‘his’ to refer to Scripture; whereas the judgments which Paul there affirms to be incomprehensible are not those of Scripture, but those of God. And Isaiah 40 does not say: ‘who has known the mind of the Scripture?’ but: ‘who has known the mind of the Lord?’ (Paul, indeed, asserts that Christians do know the mind of the Lord; but only with reference to those things that are given to us by God, as he there says in 1 Corinthians 2:12). You see, then, how sleepily you examined those passages, and how apt is your citation of them - as apt as are almost all your citations for ‘free-will’! So, too, the examples of obscurity which you allege in that rather sarcastic passage are quite irrelevant - the distinction of persons in the Godhead, the union of the Divine and human natures of Christ, and the unpardonable sin. Here, you say, are problems which have been solved. If you mean this of the enquires which the Sophists pursue when they discuss these subjects, what has the inoffensive Scripture done to you, that you should blame such criminal misuse of it on to its own purity? Scripture makes the straightforward affirmation that the Trinity, the Incarnation and the unpardonable sin are facts. There is nothing obscure or ambiguous about that. You imagine that Scripture tells us how they are what they are; but it does not, nor we need to know. It is here that the Sophists discuss their dreams; keep your criticism and condemnation for them, but acquit the Scriptures! If, on the other hand, you mean it of the fact themselves, I say again: blame, not the Scriptures, but the Arians and those to whom the Gospel is hid, who, by reason of the working of Satan, their god, cannot see the plainest proofs of the Trinity in the Godhead and of the humanity of Christ.
In a word: The perspicuity of Scripture is twofold, just as there is a double lack of light. The first is external, and relates to the ministry of the Word; the second concerns the knowledge of the heart. If you speak of internal perspicuity, the truth is that nobody who has not the Spirit of God sees a jot of what is in the Scripture, they do not understand or really know any of it. They do not believe in God, nor do they believe that they are God’s creatures, nor anything else - as Psalm 14:1 puts it, ‘The fool hath said in his heart, There is no God.’ The Spirit is needed for the understanding of all Scripture and every part of Scripture. If, on the other hand, you speak of external perspicuity, the position is that nothing whatsoever is left obscure or ambiguous, but all that is in the Scripture is through the Word brought forth into the clearest light and proclaimed to the whole world.