A quitter never wins-and-a winner never quits.
Never was anything great achieved without danger.
Our greatest glory is not in never falling, but in rising every time we fall.
If you try and lose then it isn't your fault. But if you don't try and we lose, then it's all your fault.
Orson Scott Card
Only those who dare to fail greatly can ever achieve greatly.
Robert F. Kennedy
Keep your friends for friendship, but work with the skilled and competent