I can, therefore I am.
Things do not happen. Things are made to happen.
Well done is better than well said.
If you're going through hell, keep going.
Be gentle to all and stern with yourself.
The most effective way to do it, is to do it.
Always desire to learn something useful.
What you do today can improve all your tomorrows.
It's always too early to quit.
Quality is not an act, it is a habit.
Science is wonderfully equipped to answer the question 'How?' but it gets terribly confused when you ask the question 'Why?'