Wayne Muller is new to me. So with a little research on his book on the Sabbath, I found in it:
Sabbath time can be a revolutionary challenge to the violence of overwork, mindless accumulation, and the endless multiplication of desires, responsibilities, and accomplishments. Sabbath is a way of being in time where we remember who we are, remember what we know, and taste the gifts of spirit and eternity.
My, if that isn't slower and simpler living, I don't know what is.
So for a brief read, Courtney's article is wonderful. For further reading, Wayne Muller may have even more gems!