Do not weep do not wax indignant. Understand.
Who seeks shall find.
It's always too early to quit.
You never know what motivates you.
Be gentle to all and stern with yourself.
Be kind whenever possible. It is always possible.
Wherever you are - be all there.
If you've got a talent, protect it.
Never complain and never explain.
Problems are not stop signs, they are guidelines.
If you know you are on the right track, if you have this inner knowledge, then nobody can turn you off... no matter what they say.