Someone gets it

I passed a copy of Nod off in Spanish to a young cyclist who heads off to Spain shortly for a few months. His comment after listening to it was:
'Ah, so that is why you say that.'
Which is exactly the reaction we want. Especially from someone who didn't rate themselves much as a learner. Most language learning involves very little explanation as to why a word might operate in a certain way. I believe this is what people would really like to understand.