Be gentle to all and stern with yourself.
Never complain and never explain.
Leap, and the net will appear.
By failing to prepare, you are preparing to fail.
It's always too early to quit.
Know or listen to those who know.
If you think you can do it, you can.
The wise does at once what the fool does at last.
Without hard work, nothing grows but weeds.
I can, therefore I am.
History is littered with wars which everybody knew would never happen.