[madamelic]

I'd see more as "If you aren't asking the right questions, I don't have time to teach you".

In this 'proverb', if the person had come to Mozart with the right questions or had shown he had tried, there is a jumping off point or quick feedback that could be done.

You should ask questions but you should come to the interaction having done research with results from previous attempts especially if they are accomplished (eg: very busy / have other things to do) and they aren't your friend