To know oneself, one should assert oneself.
It's always too early to quit.
Expect problems and eat them for breakfast.
The secret of getting ahead is getting started.
Know or listen to those who know.
Things do not happen. Things are made to happen.
Either you run the day or the day runs you.
By failing to prepare, you are preparing to fail.
What you do today can improve all your tomorrows.
If you think you can do it, you can.
The thing that's tricky is sometimes the best voices - just because someone hits the big notes and sounds amazing - it doesn't necessarily mean they make the greatest artists.