What I enjoyed very much was the claimed position of Raymond Aron's w.r.t. intellectualism:
"Aron’s generosity of spirit was a coefficient of his recognition that reality was complex, knowledge limited, and action essential. The leitmotif of Aron’s career was responsibility. He understood that political wisdom rests in the ability to choose the better course of action even when the best course is unavailable--which is always.
The subject of politics, Aristotle noted, is “the good life for man.” What constitutes the good life? Aron cannily reminds us that the more extravagant answers to this question are often the most malevolent. They promise everything. They tend to deliver misery and impoverishment."
I think this is a great thing to be reminded of, constantly -- in particular for intellectuals and scientists. It is almost too easy to be fooled in thinking the scientific principles or intellectual ideals will apply nicely to humans, the complexities of the real world; that we can be certain about what is truly good or the true nature of reality.
It's not that we shouldn't investigate political systems, moral systems, economic theory, metaphysics, etc; it's that we should be specially skeptic about grandiose claims that go against common sense or personal freedom.
And quoting the recent Aaronson AMA:
"(...) partly it's because I take it as almost an axiom of rationality that, if a metaphysical belief leads you to do "obviously insane" things with your life, then it's probably time to look for a better metaphysical belief. :-) (I wouldn't say the same about scientific or mathematical beliefs.)"