John Calvin Commentary Deuteronomy 28:1

"And it shall come to pass, if thou shalt hearken diligently unto the voice of Jehovah thy God, to observe to do all his commandments which I command thee this day, that Jehovah thy God will set thee on high above all the nations of the earth:" — Deuteronomy 28:1 (ASV)

And it shall come to pass, if thou shalt hearken. He teaches the same thing as before in different words; but the diversity of expression, as well as the repetition, tends to its confirmation.

First, God says that He would deal with them so bountifully that they should excel all other nations; for this is the meaning of the words: that they should be illustrious above all the rest of the world on account of the special blessings of God.

He afterwards enumerates the blessings that will never depart from them if they persevere in the service of God. Here it must be observed that they are reminded not only of how many ways God is bountiful towards His servants, but also of how many necessities they are exposed to, which require His direct and constant aid. For if we are blessed in the city and in the field, we can no more move a foot than stand still, except by His blessing.

Such also is the tendency of the whole list: that a scarcity of all things impends over us at every moment unless God continually helps us with remedies sent down from heaven, and that every good thing can only come from that one source.