Note 10 at Php 3:4: Paul was saying that if anyone could trust in his or her own goodness, he would be the one. He was holier than all of them, yet as stated in Php 3:9, the righteousness that justifies people before a holy God must be a righteousness that is equal to God's. In order to receive this righteousness by faith in Jesus Christ, people must quit relying upon their own righteousness (which is of the Law, Php 3:9) and must trust in Christ alone for the righteousness that is of God by faith.