It is better for you to be free of fear lying upon a pallet, than to have a golden couch and a rich table and be full of trouble. – Epicurus
Of the primary emotions, fear is the one that bears most directly on survival. Children show fear. Adults try not to, maybe because its shameful, or, in some circumstances, dangerous. The fear response is automatic, though, and your body runs through its reflexes whether you want it to or not. – Sebastian Junger