Well, maybe I take it totally wrong, but it reminds me of what my teacher says to me all the time; that it is not enough to play the instrument
like a pianist. Then you will probably ask, what is the difference between playing the piano like a pianist and, for example like a musician? Well, there should be no difference, you're always a musician, since these things are strictly related to each other. Almost all pianistical problems are in fact musical ones.
But there is another element in piano playing... An element which is definately the hardest of all to master and yet very few (of even the greatest masters) have a clue in this area...
Let me explain a little bit. For example, you play a scale (there are alot examples of this in the literature). You can play it louder, softer, faster, legato, more articulated, whatever you want. There are really a lot of choices you have to make, musical choices (where to make cresc. how much, etc), depending on the piece and the context. Once you are aware of all this, you should play it perfectly, technically (if you know about the movements etc.) and musically. Still there is missing one most important thing. That is, whatever you play, never, never, never, press the key (only) with your finger! You press it with your
heart and your mind. That is when you play a scale in E flat, feel the harmony, use all your imagination that you have to feel the character of E flat!
Still this is not enough. Since in only one scale, there are different intervals (so different emotions) you can make different groups out of it and compare/relate it to each other. Once you use your imagination, you are able to create a illusion. But it is obviously there. Same thing like, you have to believe that you
can and
will make a cresc. on one single note. The power of the mind is incredible and should be developped.
Once you a little idea about this, your whole concept of virtuosity and playing the piano changes forever. Unfortunately, there are really few people that know about these things, and needless to say it will take more than a lifetime to understand about this (and therefore about the works of the great composers).
I think I am losing the way from this topic a little bit

But this for me is a most important aspect of music and creating music, and keeps me thinking of all the time