I like these. I stole them from Rob Brezsny.

(1) "Only when he no longer knows what he is doing does the painter do good things." - Edgar Degas.
(2) "Sell your cleverness and buy bewilderment." – Rumi, translated by Coleman Barks.
(3) "All of us are crazy good in one way or another." - Yiddish saying.
(4) "You are either losing your mind -- or gaining your soul." - Julia Cameron.