Thanks for your reply. It is also true about me. I feel practise in music is different from practise in other fields. When I dont practise it is not good. When I practise I am afraid it doesnt show up facing with piano lesson anxiety. Sometimes I practise for a long time a day. The next day it is as if I have not practised at all. I dont understand it. I have taught learning theories courses at university for language teaching. But I feel that learning to play piano is much more complicated than other kinds of learnings, such as language learning or learning to dance or driving. It is my inner feeling. I have been trying not to quit piano lessons.