Jesus said, that except your righteousness shall exceed the righteousness of the scribes and Pharisees, you shall not enter into the kingdom of heaven. Jesus was talking about lip service, not serving God with your heart. You remember that they asked Jesus what were the two greatest commandments. He said to love God with your whole heart, soul and mind. And Jesus also said the second is like unto to first, to love your neighbor as yourself. He said in this rest the whole law and prophets. God didn’t make serving Him beyond our reach. God make the law simple for us. It is not always easy, but it is simple. He said I know man and what he is made out of. Righteousness is doing what is right in God’s eyes. As the bible says, I am the righteousness of God in Christ Jesus.