勿以貌取人 Don't judge a book by its cover

Many people, sometimes myself included, tend to judge a person by his appearances.

I was afraid of my uncle who has a scared tattoo on his arm till my mother told me a “story”. When I was a three-year-old naught boy, I always ran around the neighborhood with my toy saber. Unfortunately, one day I hit a wild dog by accident. The dog became crazy and tried to bite me. It was that time my uncle appeared and protected me with his strong arm. However, this accident left a scar on his arm. My uncle went to get a tattoo in order to cover up the scars. From that moment, he is my hero in stead of a bad looking uncle.

So we need to go beyond people's looks and focus on more internal spirits in order to truly judge a person.