It isn't that simple, either. Cold rationalization without human emotions also allowed Nazi scientists to dissect children. It can be argued that their reasoning was actually horribly flawed, but the basic point stands up pretty well.

I'm not in favor of either extreme. In general, reason should be listened to over emotion when the two are in conflict, but shutting out one or the other is not good. If your head is working right, your emotions and your reason should be integrated as much as possible.

Ayn Rand said that emotions were a sign of how your brain worked (oversimplification), and what you responded emotionally to, and how, revealed your thinking and basic values.