Brian Sutton-Smith quotes:

It is my opinion that the 21st century will be the century of play, and the heteroglossic activity of artists in the 20th century has been the forecast.

The opposite of play is not work. It's depression.

The opposite of play isnâ??t work. Itâ??s depression. To play is to act out and be willful, exultant and committed as if one is assured of oneâ??s prospects.

Play is a subset of voluntary behaviour involving a selective mechanism which reverses the usual contingencies of power so as to permit the subject a controllable and dialectical simulation of the moderately unmastered arousals and regulations of everyday life, in a way that is alternatively vivifying and euphoric.