Mozart Quotes

[piano_anne]

Hi everyone!

I am trying to remember a quote I heard someone tell me once about Mozart.  Apparently in his sonatas and concertos he said something about "The first movement is for the person I dedicated it to, the third is for the audience, and the second is only for me" (something roughly like that-I might be waaaaay off).  Does this ring any bells for anyone?  I think maybe he wrote it in one of his letters or something.  If you know the real quote (or if it even is real), could you please share?  I am hoping to mention it in a talk.
Thank you!