D'oh! Had a quote! Murphy's Law -- just changed it! Lemme dig that quote up again, though:

"Tell your heart that the fear of suffering is worse than the suffering itself," the alchemist replies. "And that no heart has ever suffered when it goes in search of its dreams, because every second of the search is a second's encounter with God and with eternity."

Another book along the same vein is The Little Prince that suggests that adults should not only stop and smell the roses but should act like kids more. Loved it!

Some quotes from it:

Grown-ups like numbers. When you tell them about a new friend, they never ask questions about what really matters. They never ask: "What does his voice sound like?" "What games does he like best?" "Does he collect butterflies?". They ask: "How old is he?" "How many brothers does he have?" "How much does he weigh?" "How much money does his father make?" Only then do they think they know him.

If you tell grown-ups, "I saw a beautiful red brick house, with geraniums at the windows and doves on the roof...," they won't be able to imagine such a house. You have to tell them, "I saw a house worth a hundred thousand francs." Then they exclaim, "What a pretty house!"