I wrote that down in a notebook more than 20 years ago. It's a quote that opens the movie Lorenzo's Oil ... a motivating thought for challenging times.
But I sometimes wonder if it's possible to celebrate the struggle so much that that becomes all we want ... struggle, conflict, challenge (drama).
Sad afflictions that can keep us from enjoying the better relationships, results, and opportunities we all want.
It's easy to see how these might set in and become habits ... several setbacks, learned helplessness, poor mentors, bad peers. (I suffer from these sometimes and I wrote 212, Smile & Move, Cross The Line, and Lead Simply.)
Perhaps the better conditions to acquire would be ATC (contribution), ATS (service), and ATL (love) ... a much better use of our time.
When you have 6 minutes, you might enjoy the video below about gratitude and living in the moment. I watch it every month or so for a boost to my attitude.
My favorite thought by Brother David Steindl-Rast (the narrator): “If you learn to respond [to this day] as if it were the first day in your life and the very last day, then you will have spent this day very well.” Roll that around in your mind for 10 seconds. It's a really wonderful reminder. (And it appears to end in the video at 2:12 ... hmmm.)