an abyss
Examples
By his very success in inventing labor-saving devices, modern man has manufactured an abyss of boredom that only the privileged classes in earlier civilizations have ever fathomed.
Man is a rope, tied between beast and Superman--a rope over an abyss.
Voluptuaries, consumed by their senses, always begin by flinging themselves with a great display of frenzy into an abyss. But they survive, they come to the surface again. And they develop a routine of the abyss: "It's four o'clock ... At five I have my abyss.”.
When the superficial wearies me, it wearies me so much that I need an abyss in order to rest.
An abyss calls another.
The body is a sponge, the soul an abyss.