I spent a few years growing up with a closet in my bedroom. The closet had an odd design. It looked normal at first, then you walked in to do closet things, and discovered that the wall on your right gave way to an alcove, making for a handy little shelf. Then you looked up, and the wall at the back of the alcove gave way again, into a crawlspace of utter nothingness, where no light could fall and which you immediately identified as the daytime retreat for every ravenous monster you kept at bay with flashlights and stuffed animals each night.
This is what it is to learn programming.
(c) https://www.stilldrinking.org/programming-sucks

Those of you who still find it enjoyable to learn the details of, say, a programming language - being able to happily recite off if NaN equals or does not equal null - you just don't yet understand how utterly fucked the whole thing is.
(с) http://tinyclouds.org/rant.html

It suddenly turned out that these really awkward abstractions that the mathematicians came up with like monads and Kleisli arrows can actually be used in programming, making programming itself rather awkward.
(с) https://www.quora.com/How-useful-is-category-theory-to-programmers