David Graeber:

What would happen if we proceeded from the reverse perspective and agreed to treat play not as some peculiar anomaly, but as our starting point, a principle already present not just in lobsters and indeed all living creatures, but also on every level where we find what physicists, chemists, and biologists refer to as “self-organizing systems”?

This is not nearly as crazy as it might sound.

Alan Watts:

If work is what must be done in order to go on living, the proper activity of That-which-Is will obviously be play. Reality is what exists without effort, Blake’s energy which is eternal delight. I have suggested that hide-and-seek, or lost-and-found, is the fundamental form of play because, at root, being is vibration. It is a state of yes/no, solid/space, here/ there, positive/negative, come/go, inside/outside, symbolized in the fundamental up/down motion of the wave. Rhythm lies at the heart of play, and thus various rhythmic actions are the primordial forms of delight-birdsong, the chirping of crickets, the beating of hearts, the pulsation of laughter, the ecstatic loss of self in drumming and dancing, the sonorous vibrations of voices and strings and bells. Absorption in rhythm can go on and on until energy fails, for when we survey the various cultures of mankind it appears there is nothing men would rather do than be lost all night in rhythm.