If you're going through hell, keep going.
Know or listen to those who know.
To know oneself, one should assert oneself.
What you do today can improve all your tomorrows.
Problems are not stop signs, they are guidelines.
It's always too early to quit.
Without hard work, nothing grows but weeds.
Things do not happen. Things are made to happen.
Expect problems and eat them for breakfast.
You never know what motivates you.
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.