Instead of quoting from the book Flow, I have decided to use a different source on the topic of work.
“[Work] should be looked upon, not as a necessary drudgery to be undergone for the
purpose of making money, but as a way of life in which the nature of man should find its proper exercise and delight and so fulfil itself to the glory of God. That it should, in fact, be thought of as a creative activity undertaken for the love of the work itself; and that man, made in God’s image, should make things, as God makes them, for the sake of doing well that is well worth doing.” — Dorothy Sayers, Creed or Chaos p.89