Are you a moral force for those around you? Do your friends know you won't support any unethical behavior? Are you raising children with the clarity that we must be dedicated to our values over ourselves?
When we experience a crack in our armor, a failure or a weakness, we must run. We must run toward it, not away from it. All accomplishments are achieved through imperfection, failure, and mistakes. If we run away, we will never reach accomplishment.
Light shines through transparent objects. When we are transparent, the light of G-d and the light of others can shine through us. When we mix in our own agenda or bias, we lose our transparency and reduce our ability to shine.