Nature is at work. Character and destiny are her handiwork. She gives us love and hate, jealousy and reverence. All that is ours is the power to choose which impulse we shall follow.
Good humor isn't a trait of character, it is an art which requires practice.
Courage and conviction are powerful weapons against an enemy who depends only on fists or guns. Animals know when you are afraid a coward knows when you are not.
Enthusiasm is the best protection in any situation. Wholeheartedness is contagious. Give yourself, if you wish to get others.