In Go, this is one of the most difficult concepts of the language to wrap one's head around. Moreso, it's a concept that makes you bang your head against the wall at first; at least it did for me. After being so used to "getting away with" not thinking about this in other languages, being forced to think this way in Go can be maddening.
Then a light goes on.
...and then you look at your old code and go "eeesh"; in my case, I was coming from a PHP background at the time I was learning Go.
Don't get me wrong - I still like PHP and other languages, and I don't use Go much as it is, but once I wrapped my head around many of it's "strangeness" (compared to other languages), I really appreciated it (because I recognised that the whole point of the language was to help prevent common errors and in many cases force better programming practices to that end), and began to enjoy it.