She was right that reality can be harsh and that you shut your eyes to it only at your peril because if you do not face up to the enemy in all his dark power, then the enemy will come up from behind some dark day and destoy you while you are facing the other way.
It is our custom to say that someone is 'lucky' or 'unlucky' if they meet with fortunate or unfortunate circumstances, respectively. It is, however, too simplistic to think in terms of random 'luck. ' Even from a scientific point of view, this is not a sufficient explanation.