"The secret things belong to the LORD our God, but the things that are revealed belong to us and to our children forever, that we may do all the words of this law." (Deuteronomy 29:29 ESV)
John Calvin, in his commentary on Deuteronomy, says about this verse...
To me there appears no doubt that, by antithesis, there is a comparison here made between the doctrine openly set forth in the Law, and the hidden and incomprehensible counsel of God, concerning which it is not lawful to inquire. In my opinion, therefore, the copula is used for the adversative particle; as though it were said, “God indeed retains to Himself secret things, which it neither concerns nor profits us to know, and which surpass our comprehension; but these things, which He has declared to us, belong to us and to our children.”
It is a remarkable passage, and especially deserving of our observation, for by it audacity and excessive curiosity are condemned, whilst pious minds are aroused to be zealous in seeking instruction. We know how anxious men are to understand things, the knowledge of which is altogether unprofitable, and even the investigation of them injurious. All of them would desire to be God’s counsellors, and to penetrate into the deepest recesses of heaven, nay, they would search into its very cabinets. Hence a heathen poet truly says, —
“Nought for mortals is too high; Our folly reaches to the sky.” (Horace, Ode III)
On the other hand, what God plainly sets before us, and would have familiarly known, is either neglected, or turned from in disgust, or put far away from us, as if it were too obscure. In the first clause, then, Moses briefly reproves and restrains that temerity which leaps beyond the bounds imposed by God; and in the latter, exhorts us to embrace the doctrine of the Law, in which God’s will is declared to us, as if He were openly speaking to us; and thus he encounters the folly of those who fly from the light presented to them, and wrongfully accuse of obscurity that doctrine, wherein God has let Himself down to the measure of our understanding. In sum, he declares that God is the best master to all who come to Him as disciples, because He faithfully and clearly explains to them all that it is useful for them to know.
And Calvin adds this in his Institutes:
“Let us… permit the Christian man to open his mind and ears to every utterance of God directed to him, provided it be with such restraint that when the Lord closes his holy lips, we also shall at once close the way to inquiry.”
Photo above is of the cloud-enshrouded Wuyi Mountains. From the Wikimedia Commons.