Flow is being completely involved in an activity for its own sake. The ego falls away. Time flies. Every action, movement, and thought follows inevitably from the previous one, like playing jazz. Your whole being is involved, and you're using your skills to the utmost.

真正的艺术家宁愿让妻子挨饿、孩子赤脚、七十岁的老母为生计操劳，也不愿做艺术以外的工作。