Glum people know the score:

Whereas positive mood seems to promote creativity, flexibility, co-operation and reliance on mental shortcuts, negative moods trigger more attentive, careful thinking, paying greater attention to the external world.

No surprise to readers of WAD (p. 154), who in this, as in so much else, are way out ahead of the field. You’re welcome!

Now wipe that vapid smile off your face and get acquainted with reality. If you can handle it.