The wise does at once what the fool does at last.
It's always too early to quit.
If you can dream it, you can do it.
If you're going through hell, keep going.
Quality is not an act, it is a habit.
After a storm comes a calm.
Well done is better than well said.
Begin to be now what you will be hereafter.
Expect problems and eat them for breakfast.
Be gentle to all and stern with yourself.
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.