In the Name of the Father and of the Son and of the Holy Spirit. Amen.
“The whole commandment that I command you today you shall be careful to do, that you may live and multiply, and go in and possess the land that the LORD swore to give to your fathers.” This is the instruction which Moses gives to the children of Israel, that they are to be careful to do all which the Lord has commanded them.
But notice that the Lord attaches a threefold promise to His commandment: that you may live and multiply, and go in and possess the land that the Lord swore to give. The Lord has already sworn to give good gifts to His people. Now, all they must do is follow the rules He has set forth in order to receive them.
We sing the hymn:
The Law of God is good and wise
And sets His will before our eyes,
Shows us the way of righteousness,
And dooms to death when we transgress (LSB 579.1).