They might know that the Lord is their God

Deuteronomy 29:1-15
These are the terms of the covenant the Lord commanded Moses to make with the Israelite on Moab, in addition to the covenant he had made with them in Horeb.
Israelite have seen many great trials, wonders and miraculous signs, but to this day the Lord has not given you a mind that understandings or eyes that see or ear that hear.
During the 40 years Israelite in desert, their clothes did not wear out, nor did the sandals on their feet. They ate no bread and drank no wine or other fermented drink. So that they might know that the Lord is their God.
I am making this covenant,with its oath, not only with you who are standing here today in presence of the Lord our God but also with those who are not here today.
Why?
Moses make covenant with the Israelite again, before they enter the promised land, this covenant make them could live peace and abundant in the land God gives them.
40 years experience and have seen many miraculous signs, but they still can not understand the mind of the Lord, so as many people cannot understand the Lord now. Its need the Holy Spirit to open their heart and eyes.
In those 40 years the blatant sign is the clothes, sandals did not war out, and they ate no bread and wine, the Lord provided everything for their living in the desert.
The covenant is a everlasting terms to Israelite.
How?
The blood of Jesus shed for our sin is a great mercy and wonder, when we repent and turn our heart to the Lord, obey His words,the covenant of the the Lord build the everlasting relationship with us.
I am the son of the Lord, a new relationship with the Lord.
The chosen men are less in the world.