" Recapitulation

At the beginning of this chapter, I advertised key properties of the Grid, that ur-stuff that underlies physical reality:

The grid fills space and time.

Every fragment of Grid-each space-time element-has the same basic properties as every other fragment.

The Grid is alive with quantum activity. Quantum activity has special characteristics. It is spontaneous and unpredictable. And to observe quantum activity, you must disturb it.

The Grid also contains enduring , material components. The cosmos is a multilayered, multicolored superconductor.

The Grid contains a metric field that gives space-time rigidity and causes gravity.

The Grid weighs, with a universal density. "

― Frank Wilczek , The Lightness of Being: Mass, Ether, and the Unification of Forces