Jesus tells a story about two guys praying at the temple. One, the Pharisee, is sure of high own righteousness. He's a good guy. He avoids doing bad things and does the things we want our church people to do. The other guy, a tax collector, appears to have nothing going for him. He's a sinner and knows he's a sinner. But even knowing himself to be a sinner, he comes to God for mercy. Jesus commends the second guy, the sinner seeking mercy, not the guy whose life was centered on his own righteousness.