Gregory the Dialogist

Over those that fear the frost, the snow rushes down. For the frost congeals below, but the snow falls down from above. And often there are persons, who, while they fear temporal adversities, expose themselves to the severity of everlasting visitation. Concerning whom it is rightly declared by the Psalmist, There were they in great fear where no fear was. …

Morals on the Book of Job, Book VII ↗

Thomas Aquinas

That they might not believe they did this with impunity, he adds, "Those who fear frost will be covered by snow," as if to say: He who fails in justice and mercy because of fear for a lesser danger, exposes himself to still greater dangers. So, Job's relatives, too, who passed him by unwilling to show any compassion for him, will themselves sustain suffering in their own losses. …

Commentary on Job ↗