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Don't worry, a person's hard work will definitely make him successful one day.

I am not worried. I don't want to be famous, and I KNOW that what I do brings joy to the people in my audiences, so I am successful.
I am not rich, I am not well known, but I am successful.
A group of musicians were talking about 'taking a break' for a while, maybe getting married, or taking a real job, then try to get back into it.
A wise older musician said "playing music is like standing in line at a theater or restaurant: if you get out of line and come back, you have to start at the back of the line.