The way I see it, our natural human instinct is to fight or flee that which we perceive to be dangerous. Although this mechanism evolved to protect us, it serves as the single greatest limiting process to our growth. To put this process in perspective and not let it rule my life, Iexpect the unexpected;make the unfamiliar familiar;make the unknown known;make the uncomfortable comfortable;believe the unbelievable.
Courage is about learning how to function despite the fear, to put aside your instincts to run or give in completely to the anger born from fear. Courage is about using your brain and your heart when every cell of your body is screaming at your to fight or flee - and then following through on what you believe is the right thing to do.
Thousands of years ago, when our ancestors encountered a predatory animal like a lion, it was best to react immediately and not stand around thinking about the lion, admiring its beauty or wondering why it was bothering them instead of tracking down some tasty antelope. Thus, the fast track to the amygdala kept our ancestors alive.