Musar zu Dewarim 29:8

These four qualities are lacking if wisdom is lacking, for they cannot join together unless there be knowledge and wisdom. If a man does not have knowledge and wisdom, he will not recognize his God and serve Him, as it is said (Jeremiah 9:23), “But let him that glorieth glory in this, that he understandeth and knoweth Me.” The Prophet means that everyone who possesses wisdom will understand and know “Me” immediately. For it is through knowledge that a man recognizes his Creator and then serves Him. In this manner, is it explained in many places. Concerning reason, it is said (Deuteronomy 29:8), “In order that you may do everything with intelligence”, and concerning knowledge, it is said (ibid., 4:35), “Unto thee it was shown, that thou mightest know.”

In the final verse of our portion: "Observe therefore the words of this covenant, and do them, that you may make all that you do prosper," this message is stressed once more.