I have found those who like to talk about morals tend to not live as they preach. Just live a good life and shut up about living a "moral" life. That does not mean don't stand up to evil, but don't be a prick about your moral values. No one likes a self-righteous ass.....that applies to both believers and atheists alike.
But if we walk in the light, as He is in the light, we have fellowship with one another, and the blood of Jesus, His Son, purifies us from all sin.