Charles Spurgeon Commentary Deuteronomy 29:2-4

"And Moses called unto all Israel, and said unto them, Ye have seen all that Jehovah did before your eyes in the land of Egypt unto Pharaoh, and unto all his servants, and unto all his land; the great trials which thine eyes saw, the signs, and those great wonders: but Jehovah hath not given you a heart to know, and eyes to see, and ears to hear, unto this day." — Deuteronomy 29:2-4 (ASV)

You saw all that, and yet did not see it; you saw the external work, but the internal lesson you did not perceive. A very mournful statement to make; but God's servants are not sent to flatter man but to speak the truth, however painful the speaking of it may be.