Jesus (Y'shua) states, all the commandments of God can be summarized into two points: Love God with all your heart, soul, and mind and Love Your Neighbor as Yourself (as you would want to be treated). This is the central purpose of the Bible:  to show us the correct way to live in a right, healthy, and fulfilling relationship with God and our fellow man.
see:  Matthew 22:36-40; Mark 12:28-31