What comes first, "using" or "understanding"? The natural mode of learning is to first use, leading slowly to understanding. New ideas are a source of power to do something.
Seymour Papert

The teacher is the one who gets the most out of the lessons, and the true teacher is the learner.
Elbert Hubbard

Education is the kindling of a flame, not the filling of a vessel.
Socrates

Sixty years ago I knew everything; now I know nothing; education is a progressive discovery of our own ignorance.
Will Durant

When did you know... how hard was it from being almost unknown to becoming one of the greatest pianists of all time?

It took me a long time..., they call it the learning tree for a reason. the more you know, the faster you learn and the more you learn. It accelerates - geometric progression.
Yanni