The other day, Anijo quoted Billy Joel from a link provided by Ned. T'was about people who believe in god, where they dim-witted or what and were they afraid.
No, they're not answered Joel and also he didn't know whether they are afraid or not (*).
This exchange is a multiple issues one, but let's concentrate on intelligence and reason though.
Just, what is intelligence (as opposed to being dim-witted)? Among the zillions propositions that have been suggested, what about the ability to put two and two together in as many opportunities as can be and as fast as can be?
May I suggest another term be introduced, that of "pure reason", the one Mr. Spock is famous for?
Now, this is where the notion of reason appears, reason that is the ability to form concepts. Only humans can create concepts of course and this isn't natural at all but a product of the human brain. In that sense, reason is a very young newcomer in the history of the world of animals.
But even if intelligence at its highest is to be found among humans (and sometimes one wonders), we must never forget that we humans are made of emotions, nearly exclusively of emotions and that our intelligence is a very, very minor component of what we actually are on a daily basis. Our deepest and most meaningful self is moulded in emotions as is represented in Maslow's hierarchy of needs.
What differentiates reason from intelligence is that the latter doesn't exclude passions (it simply cannot, it lives among them) whereas the former does. This is what Mr. Spock is: pure unaltered reason and unaffected by passions. Pure reason following the rules of logic as enunciated by Aristotles 2.400 years ago.
Now, this is how we can understand why people deemed intelligent can yet be religious ones, buy assault weapons after what happened the other day, vote against their own interest in politics (no, excuse me, these are mere cretins), or hold contradictory opinions on whatever topic. It is our passions (in the academic sense, that of the European XVIIth century) that decide for us, not reason and Mr. Spock is a man of reason, maybe not particularly intelligent since that would mean he's also partly driven by his emotions.
Mr. Spock of course couldn't fall in love, that would be the most unreasonable thing to do. Also, there's no way he could be a religious person.
Indeed, believers aren't necessarily "dim-witted" and this asks the question of why intelligent grown-ups still indulge in believing in fairy tales. Isn't it just because a choice has been made at their place between Jerusalem and Athens as Lev Chestov said? Or that their passions have made the choice for them?
Needless to say, the character of Mr. Spock is fictitious and always will be: Humans will always be a compound of nearly uncontrollable passions and emotions continuously struggling to keep intelligence and reason under their ruling power. As Schopenhauer said, intelligence is at the service of the Will which is the ultimate master.
The more prevalent emotions and passions are, the less intelligence and reason have any say. Just consider any love relations. Need I say more?
(*) Methinks they are, all religions being the product of fear.