Know or listen to those who know.
Be gentle to all and stern with yourself.
Expect problems and eat them for breakfast.
Things do not happen. Things are made to happen.
Well done is better than well said.
If you're going through hell, keep going.
I can, therefore I am.
It's always too early to quit.
Problems are not stop signs, they are guidelines.
Only the educated are free.
Is it right to probe so deeply into Nature's secrets? The question must here be raised whether it will benefit mankind, or whether the knowledge will be harmful.