Charlie Munger on the danger of ideology

Another thing I think should be avoided is extremely intense ideology, because it cabbages up one’s mind. You’ve seen that. You see a lot of it on TV, you know preachers for instance, they’ve all got different ideas about theology and a lot of them have minds that are made of cabbage.

But that can happen with political ideology. And if you’re young it’s easy to drift into loyalties and when you announce that you’re a loyal member and you start shouting the orthodox ideology out what you’re doing is pounding it in, pounding it in, and you’re gradually ruining your mind. So you want to be very careful with this ideology. It’s a big danger.

~ Charlie Munger