It is to our lack of proper content ("notre manque de contenu propre:;», Fr.), of our inner emptiness that we need occupations and distractions, otherwise ("faute de quoi", Fr.) we experience boredom, which is nothing elses than the feeling of unease that take hold of us when our spirit is not absorbed by the mirages of life.
It seems to me that all of the evil in life comes from idleness, boredom, and psychic emptiness, but all of that is inevitable when you become accustomed to living at others' expense.
A great affliction of all Philistines is that idealities afford them no entertainment, but to escape from boredom they are always in need of realities.
Boredom has been used as a technique, it is a device. In Zen, boredom is used as a device: you are bored to death, and you are not allowed to escape. You are not to go outside, you are not to entertain yourself, you are not to do, you are not to talk, you are not to read novels and detective stories. No thrill. No possibility to escape anywhere.
There is no such thing on earth as an uninteresting subject; the only thing that can exist is an uninterested person. Nothing is more keenly required than a defence of bores. When Byron divided humanity into the bores and bored, he omitted to notice that the higher qualities exist entirely in the bores, the lower qualities in the bored, among whom he counted himself. The bore, by his starry enthusiasm, his solemn happiness, may, in some sense, have proved himself poetical. The bored has certainly proved himself prosaic.