My post ...
indicates that all hands are different and not any one approach, IMO, works for everyone.
Absolutely, moreover, not only all hands are different, but also all people are different, and everyone needs a different personal approach, as well. And this is my biggest problem with Bernhard, as I feel that his approach is rigid and seem to be carved into a stone--Scarlatti is good-Czerni is bad. Thumb over is good-thumb under is bad. His fingering for scales is good, conventional fingering is bad. Let's debunk that, this, and those, etc. etc. etc. , with no any hint on individual approach. This is where I see the "wrong message".
I myself emphasised here many times that it is impossible to help someone until you see the problem yourself (or in many cases even spend with the person sometime, as the problem can be completely unrelated, and personal one). Each problem needs different solution, and for some Scarlatti works the best, but for some Czerni is invaluable. For some hands one fingering works the best, but for others it is disaster. Some phrases indeed can be played with rolling motion, however, many cannot. Some scales should be played conventionally (i.e. thumb under), but for some the thumb over will be a solution. It is best for some students to leave repertoire choices for themselves, but for some (might be most of the cases) you need to lead them methodically, developing the pianism in a most effective and efficient way, according to the student strengths and weaknesses, etc. etc. etc.
There are however, some fundamental principals, which are common for everbody and are a foundation of any strong and accomplished pianism:
Music image comes first.
Complete relaxation and freedom, both mental and physical, so there is no any barrier for the music image to "flow" into the finger tips.
Careful listening to yourself and correcting things "on a fly" as for what sound your finger tip produces and how your music image is realized.
Analyzing and realizing precisely how music, its melodic, harmonic, and emotional context, its phrasing and shape, etc. dictates your pianistic motion and gesture.
All that should be based on the main technical principal, which is accumulation and then immediate release of energy, when your finger returns into "idle" state and whole your body is resting.
All this together produces that touch, or sound, which ultimately is what the whole technique is all about.
More on that here:
https://www.pianostreet.com/smf/index.php/topic,26910.0.htmlAnd here is the main and most important thing--physically, playing piano is only 10%. The rest 90% is "idling" state, giving you room for hard and intense mental work.
Best, M
P.S. Sorry for a long post. I always think if one cannot put things into a short and consise form (one or (most) two paragraphs), then one does not have a good grasp of the idea. Here however, we needed to cover a lot of stuff.