[mrguyorama]

I think 90% of the difficulty of learning to program is building and interpreting your mental models of how everything works. This is unfortunate, because everyone's mental models are different, and it's the same problem we see in math teaching, where things are extremely difficult until it "clicks" and suddenly it's so easy

[pjmlp]

It is why everyone has to write their own version of a monad tutorial. :)