You identify yourself by what you do when no one is watching. The supervised athlete may be the harest worker, the most selfless and responsible competitor. But how he practice3s when no one sees him, how he interacts with teammates when the coach is not within listening distance -- that's when he defines himself. His character.
Theodore Roosevelt extend the definition to self-awareness and independent self-evaluation saying, "I care not what others think of what I do, but care very much about what I think of what I do. That is character."