Deuteronomy 29:4 - Joseph Benson’s Commentary on the Old and New Testaments

The Lord hath not given you a heart to perceive Which he would have done had you sincerely and earnestly desired and asked it of him; and you are inexcusable that you have not, considering his signal mercies on the one hand, and awful judgments on the other, of which you have had such great experience, and which called loudly upon you to humble yourselves before him in true repentance, and seek his grace to enable you to understand and improve by such extraordinary dispensations and wonderful works. For he does not speak thus to excuse their wickedness, but to direct them to whom they must have recourse for a good understanding of God's works; and to intimate that although the hearing ear, and the seeing eye, be the workmanship of God, yet their want of these was their own fault, and the just punishment of their former sins; their present case being like theirs in Isaiah's time, who first shut their own eyes and ears that they might not see and hear, and would not understand, and then, by the righteous judgment of God, had their eyes and ears closed that they should not see, and hear, and understand. God's readiness to do us good in other things, is a plain evidence, that if we have not grace, that best of gifts, it is our own fault and not his: he would have gathered us, and we would not.