The Way to Obey the Greatest Commandment

Jesus said this is the greatest commandment:

Deuteronomy 6: 5-7

And thou shalt love the Lord thy God with all thine heart, and with all thy soul, and with all thy might.
And these words, which I command thee this day, shall be in thine heart;
And thou shalt teach them diligently unto thy children, and thou shalt talk of them when thou sittest in thine  
  house, and when thou walkest by the way, and when thou liest down, and when thou risest up.