“Believe not in anything simply because you have heard it,
Believe not in anything simply because it was spoken and rumored by many,
Believe not in anything simply because it was found written in your religious texts,
Believe not in anything merely on the authority of teachers and elders,
Believe not in traditions because they have been handed down for generations,
But after observation and analysis, if anything agrees with reason and is conducive to the good and benefit of one and all, accept it and live up to it.”
Buddha was a scientist. What he said above refers to rationalism.