Do not believe in anything (simply) because you have heard it.
Do not believe in traditions because they been handed down for many generations.
Do not believe in anything because it is spoken and rumoured by many.
Do not believe in anything simply because it is found written in your religious books.
But after observation and analysis, when you find that anything agrees with reason and is conducive to the good and benefit of one and all, then accept it and live up to it.