Be kind to others

I've started to realize something. You should be kind to everyone, no matter how they act towards you. After all, people are the way they are because of their past. Their bitterness could be a result of being hurt by people before. I've always been a little bit mean ever since I learned the nicest people get walked all over. But I shouldn't let my past make me bitter; be kind to others but be cautious of others.