A GK Chesterton quote I came across in John Barrow's "Impossibility" (The Science of Limits and the Limits of Science.)
This describes so accurately how I have always felt... (and why I'm a scientist and not a poet.)
As featured on MindHacks.com 31.07.08:
Update: ironically, I had only seen the snippet quoted in the book I mention above. This image was linked on a blog which revealed the full quote was not actually about scientists, but critics, which puts rather a different spin on it!