If others make you fell bad, no more mr. The limited side is stupidity, wisdom is unlimited. Set wisdom as your goal and you will never stop because there are always new ways of learning which allow access to more new knowledge. You cannot judje a person unless you lived their life. Think of games - they are interesting because of a challenge to win.
Life is a big game, a big challenge.
Respect other's opinions because there is no such thing as right opinion for everybody, everyone has a right opinion for himself. Ofourse, minor adjustments are needed for some occasions, but your own personality is what you are and losing it completely means losing yourself. Chameleon behavior is very useful in situations that have the potential of making you fell bad. Be someone different for a day. Correct your own personality and make it better, be a better self.