Maya Angelou's eloquence, brilliance and ability to get to the heart of a matter have made me wish she would run for public office on several occasions. But, I guess her writings will have to do.
What she does here is elucidates the most important virtue:
Courage is the most important of all the virtues. Because without courage you can't practice all the other virtues consistently. You can't be consistently kind, or fair, or humane, or generous. Not without courage.
I couldn't have said it better.