Emptiness Is Useful
Thirty spokes share the wheel's hub;
It is the center hole that makes it useful.

Shape clay into a vessel;
It is the space within that makes it useful.

Cut doors and windows for a room;
It is the holes which make it useful.

Therefore profit comes from what is there;
Usefulness from what is not there.

- Lao-Tzu continuously empties content that is older 2 hours, to make its space more useful, and keep you up to date.