The relationship to one's fellow man is the relationship of prayer, the relationship to oneself is the relationship of striving; it is from prayer that one draws the strength for one's striving.
One isn't necessarily born with courage, but one is born with potential. Without courage, we cannot practice any other virtue with consistency. We can't be kind, true, merciful, generous, or honest.
I do not now so much as wish to have the Strength of Youth again that I wish'd in Youth for the Strength of an Ox or Elephant. For it is our Business only to make the best Use we can of the Powers granted us by Nature.