Dare to do something great.  First conceive of something in your heart, that you really want to do.  Then make that your supreme duty…

Devote yourself to its achievement, paying no attention to distractions, or what others may think.   This is the path to self-control and concentration of thought.

Make sure this project is bigger than you, and will cause you to have to become more, simply to achieve it.  And know, you may not achieve it.  But that is why you do it…

For even if you fail, (as you may, when starting bold things), the strength of character you develop is the true benchmark of success.  Strength is developed by stretching yourself, asking more, through effort and practice.

Just as you can build muscles in the gym through resistance exercise, a person of weak thoughts can make himself strong by exercising in right thinking.