And don’t think about it either.
What we are thinking about when we do something (like play an instrument) makes all the difference in what happens. Think the wrong thing, and you can sound like you have never practiced a minute in your life. Think the right thing and you can achieve things you >thought< were impossible.
Can we control our thoughts? Yes and no. The usual trick at this point is to say: “Don’t think of a green apple” or something to that effect. Of course, the first thing appearing in your mind’s eye is the apple. So does that mean you can’t control your thoughts, that your mind is going to go wherever it wants, like wild horses? Not really, but there are misconceptions about this; first let’s look at the thought patterns that bind and cripple us, then some ways to change them.