The secret to success is to know something nobody else knows.
The search for happiness is one of the chief sources of unhappiness.
True progress comes from challenging the status quo.
The aim of proof is to understand, not just to verify.
For the past 33 years, I have looked in the mirror every morning and asked myself: 'If today were the last day of my life, would I want to do what I am about to do today?' And whenever the answer has been 'No' for too many days in a row, I know I need to change something.
"Every life is a story worth telling, if only we take the time to listen."