I was looked up to by Christians of all denominations. Paul looked good. But the thing that kept Paul from the Lord was not his sin . . . They are trusting their achievements, accomplishments and goodness. The key verse in this passage is verse nine.
Righteousness is a word that means right standing.
To be in right standing with God we have to have met God's requirements. The problem is that God's requirement for salvation is perfect obedience. Hear that . . . It's because sometimes they include things on the test that weren't covered. Sometimes they recognize that they did not teach something as well as they should.