Doubt even if thou doubtest thyself.
Doubt even if thou doubtest all.
It seems sometimes as if beneath all conscious doubt there lay some deepest certainty. O kill it! Slay the snake!
The horn of the Doubt-Goat be exalted!
Dive deeper, ever deeper, into the Abyss of Mind, until thou unearth the fox THAT. On, hounds! Yoicks! Tally-ho! Bring THAT to bay!
Then, wind the Mort!