"Be not afraid" is said to have been mentioned in the bible quite often. And an old friend reminded me of it recently by sending me a card saying: "If you are never afraid, you have no need to be brave".
It does not mean you need to be a coward either, just that once you have transcended fear, every event becomes a lesson to teach you rather than a setback to be conquered.
And having the peace of mind to think calmly and logically will always give you an advantage over the ones that act from fear and the instincts of the oldest part of their brain.