""Look into thy heart and write!" is good advice, but not if interpreted to mean, "Look nowhere else!" The poet should know his world and, so far as his art is concerned, any kind of battering from his world is better than his own self-indulgent brooding."

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I have been battering away at Saturn, returning to the charge every now and then. I have effected several breaches in the solid ring, and now I am splash into the fluid one, amid a clash of symbols truly astounding. When I reappear it will be in the dusky ring, which is something like the state of the air supposing the siege of Sebastopol conducted from a forest of guns 100 miles one way, and 30,000 miles the other, and the shot never to stop, but go spinning away round a circle, radius 170,000 miles.

— James Clerk Maxwell