“Before you can ever make a clean and unamended confession of your sin, you have to first begin by confessing your righteousness. It’s not just your sin that separates you from God; your righteousness does as well. Because, when you are convinced you are righteous, you don’t seek the forgiving, rescuing, and restoring mercy that can be found only in Jesus Christ.”
-- Paul David Tripp, Whiter Than Snow
I know a guy who is passionate about service but is constantly and unwaveringly angry about other Christians' lack of service. He despises his brothers and sisters for not doing as much as he does and looks down on them.
He has turned service into righteousness and therefore revealed his own lack.
(HT for the quote: Of First Importance)