In both the Old Testament and the New Testament there is a climatic point: a passage, I mean, which so epitomizes all the teaching of that section of our Bible that we should be eager to save it were all else to be destroyed. In the Old Testament it is the Ten Commandments, which form a foundation of civil society. Society would go to pieces were not the Ten Commandments understood and usually obeyed. In the New Testament it is the Lord’s Prayer which lays foundations for the harmonious inner life as the Ten Commandments do for the outer. Here speaks the aspiring spirit to its Maker. This is the love-song of the Christian world.
The Lord's Prayer: A Mathematician's Creed 