I would say 'the ability to learn how to learn'. OK, it gets complicated but the way I see it is that learning is great, if you know when you have reached enoug

I would say 'the ability to learn how to learn'. OK, it gets complicated but the way I see it is that learning is great, if you know when you have reached enough knowledge to move on. On the other side, not learn too much as the same time, like being able to know how to do 'Hello World' in 24 languages is not useful, but some people/companies consider it as learning.