To know oneself, one should assert oneself.
Expect problems and eat them for breakfast.
It's always too early to quit.
Well done is better than well said.
Never complain and never explain.
Begin to be now what you will be hereafter.
You never know what motivates you.
What you do today can improve all your tomorrows.
Be gentle to all and stern with yourself.
The wise does at once what the fool does at last.
I've studied all my musical life, but learning is only good if you do something constructive with it.