Thematic Bible: What is not vain

And when Moses had ended speaking all these words to all Israel, he said unto them, Set your hearts unto all the words that I testify among you this day, which ye shall command your children to take heed to do, all the words of this law. For it is no vain word for you, but it is your life, and through this word ye shall prolong your days on the land whereunto ye pass over the Jordan to possess it.