Do quotes really matter?

every so ofter i'll read a quote from some famous scientists, either supporting or refuting some idea about god, evolution, or any of the other topics which often are debated in here. my question is, do they really matter? do personal feeling really make a difference when it comes to science. einstein is one who's "religion without science" quote is thrown around a lot. regardless if einstein was an atheist, a christian, a jew, or a hari krishna, aren't we overlooking the possibility that even einstein can be wrong in his personal beliefs? i mean accepting scientific models which can be verified through repeated experiments is one thing. taking someone at their word about a presumed god is entirely different. don't you think?