On depression by C.S. Lewis

On depression

My own idea, for what it is worth, is that all sadness which is not either arising from the repentance of a concrete sin and hastening towards concrete amendment or restitution, or else arising from pity and hastening to active assistance, is simply bad; and I think that we all sin by needlessly disobeying the apostolic injunction to “rejoice” as by anything else. Humility, after the first shock, is a cheerful virtue: it is the high-minded unbeliever desperately trying in the teeth of repeated disillusions to retain his “faith in human nature” who is really sad.

From The Problem of Pain
Compiled in Words to Live By