Do not believe in anything simply because you have heard it. Do not believe in anything simply because it is spoken and rumored by many. Do not believe in anything simply because it is found written in your religious books. Do not believe in anything merely on the authority of your teachers and elders.
No man ever got very high by pulling other people down. The intelligent merchant does not knock his competitors. The sensible worker does not work those who work with him. Don't knock your friends. Don't knock your enemies. Don't knock yourself.