Calvin on the Bounds of the Word of God

I was reading in Calvin's Institutes of the Christian Religion (book 3, chapter 21) yesterday evening, and came across some really good discussion about the boundaries of the Word of God. Calvin addresses two group of people, those who try to understand predestination beyond what is revealed in the Scriptures, and those who fear to teach even what is revealed there. So, the following discussion is directed particularly to the doctrine of predestination, but applies more broadly to the study of any matter in the Scriptures:

To those who would go beyond the particulars that are revealed in Scripture, Calvin cautions (II.21.2):

If we give due weight to the consideration, that the word of the Lord is the only way which can conduct us to the investigation of whatever it is lawful for us to hold with regard to him—is the only light which can enable us to discern what we ought to see with regard to him, it will curb and restrain all presumption. For it will show us that the moment we go beyond the bounds of the word we are out of the course, in darkness, and must every now and then stumble, go astray, and fall. Let it, therefore, be our first principle that to desire any other knowledge of predestination than that which is expounded by the word of God, is no less infatuated than to walk where there is no path, or to seek light in darkness. Let us not be ashamed to be ignorant in a matter in which ignorance is learning. Rather let us willingly abstain from the search after knowledge, to which it is both foolish as well as perilous, and even fatal to aspire. If an unrestrained imagination urges us, our proper course is to oppose it with these words, “It is not good to eat much honey: so for men to search their own glory is not glory,” (Prov. 25.27). There is good reason to dread a presumption which can only plunge us headlong into ruin.

And to those who fear to teach the doctrine of predestination to the church (II.21.3):

[I]n order to keep the legitimate course in this matter, we must return to the word of God, in which we are furnished with the right rule of understanding. For Scripture is the school of the Holy Spirit, in which as nothing useful and necessary to be known has been omitted, so nothing is taught but what it is of importance to know. Every thing, therefore delivered in Scripture on the subject of predestination, we must beware of keeping from the faithful, lest we seem either maliciously to deprive them of the blessing of God, or to accuse and scoff at the Spirit, as having divulged what ought on any account to be suppressed. Let us, I say, allow the Christian to unlock his mind and ears to all the words of God which are addressed to him, provided he do it with this moderation—viz. that whenever the Lord shuts his sacred mouth, he also desists from inquiry. The best rule of sobriety is, not only in learning to follow wherever God leads, but also when he makes an end of teaching, to cease also from wishing to be wise. The danger which they dread is not so great that we ought on account of it to turn away our minds from the oracles of God. There is a celebrated saying of Solomon, “It is the glory of God to conceal a thing,” (Prov. 25.2). But since both piety and common sense dictate that this is not to be understood of every thing, we must look for a distinction, lest under the pretence of modesty and sobriety we be satisfied with a brutish ignorance. This is clearly expressed by Moses in a few words, “The secret things belong unto the Lord our God: but those things which are revealed belong unto us, and to our children for ever,” (Deut. 29.29). We see how he exhorts the people to study the doctrine of the law in accordance with a heavenly decree, because God has been pleased to promulgate it, while he at the same time confines them within these boundaries, for the simple reason that it is not lawful for men to pry into the secret things of God.