We cannot assert that someone who is well behaved, devout, and virtuous in ordinary life, is also already certain of surviving the great situations where it is a question of life or death. The grace of such endurance is a grace that no one can merit by good behavior in ordinary life. But ordinary life is indeed the way in which we must remain ready for the decisive situations; it can be the way in which God wants to give us the very grace—which we cannot demand—of surviving the great hours of our life. We must be faithful in little things in order to be permitted to hope that God in his grace will also send us faithfulness in great things. – Karl Rahner, Words of Faith