Is it oversimplifying something that needs to be complicated to recognize that, "You shall love the Lord your God with all your heart, and with all your soul, and with all your mind.' This is the greatest and first commandment. And a second is like it: 'You shall love your neighbor as yourself.' On these two commandments hang all the law and the prophets" describes a pre-Fall understanding of how things were originally meant to be, had mankind not chosen the path we did? Find a human who could perfectly keep those two commandments, and there would be no need for any others. However, the only human who could perfectly keep those two commandments is the one who reminded us of them. For the rest of us, we need God's Law written out in detail.