The concentration of a small child at play is analogous to the concentration of the artist of any discipline. In real play, which is real concentration, the child is not only outside time, he is outside himself. He has thrown himself completely into whatever it is he is doing. A child playing a game, building a sand castle, painting a picture, is completely in what he is doing. His self-consciousness is gone; his consciousness is wholly focused outside himself.

Section 1.3 - The Crosswicks Journal - A Circle of Quiet (1972)