We must always change, renew, rejuvenate ourselves; otherwise we harden.

"Now I was suddenly made aware of another world of beauty and mystery such as I had never imagined to exist, except in poetry...I experienced an overwhelming emotion in the presence of nature, especially at evening. It began to wear a kind of sacramental character for me. I approached it with a sense of almost religious awe, and in the hush which comes before sunset, I felt again the presence of an unfathomable mystery. The song of the birds, the shapes of the trees, the colors of the sunset, were so many signs of this presence, which seemed to be drawing me to itself. " - Bede Griffiths