Yehudi Menuhin, Robin Hill and the Psychology of Performance

I'm getting rather mixed messages from the QE2.
The second concert went very well last night and there was a large and appreciative audience. The programme was very much enjoyed, and, there have been many wonderful comments.
However Robin wasn't pleased with it.
There was no particular reason for this, which was making it difficult for me to reply, with any form of reassurance.
So I turned to Robin's own book, 'The Guitar Gymnasium', and read his chapter on 'Performance and Practice'.
At one point Robin refers to Yehudi Menuhin's book, 'Unfinished Journey', and whilst the instrument may be different, the psychology is the same:

"The performing violinist continually reviews the hours, days and weeks preceding a performance, charting the many elements that will release his potential - or put a brake on it. He knows that when his body is exercised, his blood circulating, his stomach light, his mind clear, the music ringing in his heart, his violin clean and polished, it's strings in good order, the bow hair full and evenly spread, then - but then only - he is in command. But neglect of the least of these elements must gnaw his conscience. The audience, even the critic, may not suspect his troubled conscience, or may ascribe a blemish to an irrelevant cause, all unaware of the player's silent admission of insufficiency, his self-disgust, his begging to be given another chance. Even if no fault is noted, the audience's plaudits, their stamping and standing, are of no comfort to him then." Yehudi Menuhin.

So as you can see, Robin is in very good company, with any doubts he may have.
I suspect that the loss of a days practise, due to illness, was enough to upset his equilibrium.
However, he has one more concert to perform on the QE2, which will be on Sunday.
As he is docking in Quebec, Canada, later today, I will at last have the chance to speak to him again.
I must remember to tell him to read his own chapter on performance and remind himself just how difficult it is!