Omar Khayyam — "The true philosopher is he who doubts everything, and believes nothing."

"And if the Wine you drink, the Lip you press, End in the Nothing all Things end in—Yes—Then fancy while thou art, thou art but what Thou shalt be—Nothing—Thou shalt not be less."

"And this I know: whether the one True Light Kindle to Love, or Wrath consume me quite, One Flash of it within the Tavern caught Better than in the Temple lost outright."

"There was a Door to which I found no Key: There was a Veil past which I could not see: Some little Talk awhile of Me and Thee There was—and then no more of Thee and Me."

"Indeed, indeed, Repentance oft before I swore—but was I sober when I swore?"

"Myself when young did eagerly frequent Doctor and Saint, and heard great Argument About it and about: but evermore Came out by the same Door as in I went."