I think everyone has trouble in math class, eventually.
Not in my experience, unless you're talking about trouble teaching them. It's very possible to run out of classes before you hit anything truly difficult (in my country there are no more classes after Masters level, a PhD student is expected to be doing research - the american notion of "all but dissertation" provokes endless amusement, here you're "all but dissertation" from day 1).
Another month has passed and here is a new rationality quotes thread. The usual rules are:
And one new rule: