8. "Courage Isn't A Matter Of Not Being Frightened, You Know. Its Being Afraid And Doing What You Have To Do Anyway." - The Third Doctor
The Episode: Planet of the Daleks The Lesson: Everyone gets afraid now and again. What separates the courageous from the weak is that those with courage know that they afraid, and they go forward anyway. Fear is not a sign of weakness, inaction because of that fear is.