cada vez que el sol cruza el cielo

Paul Coelho happens to be quite quotable. Here's an especially good one which Proverbia.net sent to me today:

Cuando todos los días resultan iguales es porque el hombre ha dejado de percibir las cosas buenas que surgen en su vida cada vez que el sol cruza el cielo.
- Paulo Coelho

"Every day comes to seem the same when a person has stopped recognizing the good things which come up in her life every time the sun crosses the sky."