Learning a language is just a mental jigsaw puzzle

I've just been thinking about how learning a language is basically like doing a big mental jigsaw puzzle.

You have to find the various pieces (the verbs, the nouns, the prepositions etc.) and then work out the shapes (the grammatical rules) with which the pieces fit together, and then 'simply' put the pieces together.

If you think of it like that, it's not really that complicated. Not sure what the point in this post was, apart from to share my morning thoughts.