The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.
The greatest glory in living lies not in never falling, but in rising every time we fall.
Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
I would rather have questions that can't be answered than answers that can't be questioned.
What lies behind us and what lies before us are tiny matters compared to what lies within us.
Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.