Boredom

The spectator. All the world is a stage, and he's the audience. Neither contented nor discontented. He endures things.  Purposeless. Careless. Not threatening; not helpful.--Tone scale

The cure for boredom is curiosity. There is no cure for curiosity. ---Ellen Parr:

“Work spares us from three evils: boredom, vice, and need”---- Voltaire