J. C. Maxwellleft‎ right‎M. C. Escher & Sir Roger Penrose

At last the anchor was up, the sails were set, and off we glided......
—Herman Melville,Moby Dick, Cap. XXII
Life's but a walking shadow, a poor player

That struts and frets his hour upon the stage
And then is heard no more: it is a tale
Told by an idiot, full of sound and fury,
Signifying nothing.

—William Shakespeare,Macbeth,Act V,scene V
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