Beethoven's Sonatas

I am practicing Beethoven's sonatas for a series of performances in autumn.
I need to work them out. I have to be very inventive as these pieces are so complex.
How much of the musical essence I can dig out and express from the seemingly mundane melodies depends on how deeply I feel in the first place.
As Isaac Stern said, I need to take an attitude of "Listen to me!" instead of "Would you like to listen to me?", otherwise, it is a dream within a dream to sway the heart of the audience.

Concentrate on these five minutes. Think over and over how to play these three notes.
I can forget it afterwards. If I remember the process, I can follow it and revive the same empathy again.

There is a world in three notes. There is despair, the abyss, some obscure movements, then the next three notes appear with a hint of peace. I play feeling warmth from my heart, even at pianissimo level at which the sound is barely audible. A six-degree interval, whether piano or crescendo, suggests an uprising emotion,.　The chord progression, particularly the bass movement, determines whether the three notes are heavy or light. A chord expresses emotion and makes me wonder − where will it take me? I need to move on to the next chord as if it is born fresh. I devote my whole body and soul to this sound.

If I may use a slightly affected expression, this is the exquisite enjoyment of being a servant of music.