Just because your faithful, does not mean you can't be brilliant. Most of you here, in my opinion, and dispite my harsh critisism of your religeon are probably brilliant for finding the wisdom to throw off (earthly) collectivism.
What Rand is saying, and I concur, is that religeon is a handycap. In order to believe it, you must suspend part of your rational mind. This limits you profoundly.
Was Isaac Newton brilliant? Of course. He would have been even more so if he did not have to pass his reason through the filter of religeon where it was neccessarily deminished.