Well done is better than well said.
Things do not happen. Things are made to happen.
You never know what motivates you.
Know or listen to those who know.
Begin to be now what you will be hereafter.
Only the educated are free.
If you think you can do it, you can.
Be gentle to all and stern with yourself.
Quality is not an act, it is a habit.
It's always too early to quit.
When you design it, think how you would feel if you had to fly it! Safety first!