If something is not good enough, stop doing it.

We shouldn't be afraid to fail- if we are not failing we are not pushing. 80% of the stuff in the studio is not going to work. If something is not good enough, stop doing it.

My voice is not good enough for me to sing a song.

I regret not doing a film that I was offered with Clark Gable because the script was not good enough.

The purely agitational attitude is not good enough for a detailed consideration of a subject.

Don't ever feel that your not good enough for them, they are the ones not good enough for you