Monads in Pictures

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Reference: Monads in Pictures

Monads are not hard. But they are entirely abstract, and that makes them hard to grasp. Just as it requires a whole year of Algebra to accept that you can do math with letters instead of numbers, Monads usually defy written explanation.

In this post, John Wiegly does a good job of explaining how Monads work with pictures. The visual explanation is slightly better than words. I think, though, that it just takes time, practice, and patience to build the necessary abstraction structures in your brain.