Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
The greatest glory in living lies not in never falling, but in rising every time we fall.
Success is not final, failure is not fatal: It is the courage to continue that counts.
The only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle.