Obstacles cannot crush me. Every obstacle yields to stern resolve, he who is fixed to a star does not change his mind. Leonardo da Vinci
Fear not that thy life shall come to an end, but rather that it shall never have a beginning. Cardinal Newman
Many 
persons have the wrong idea about what constitutes true happiness. It is not attained through self-gratification, but through fidelity to a worthy purpose. Helen Keller
The successful person has the habit of doing the things failures don't like to do. They don't like doing them either, necessarily, but their disliking is subordinated to the strength of their purpose. E.M. Gray
Persistence is actually self-discipline in action. The good news is that the more you discipline yourself to persist on a major task, the more you like and respect yourself, and the higher is your self-esteem. And the more you like and respect yourself, the easier it is for you to discipline yourself to persist even more. Brian Tracy
