“A little stallion gallops across the leafing fingers-
Black the gate leaps open, I sing;
How did we live here?”

Das Lichtmikroskop öffnete das erste Tor zum Mikrokosmos. Das Elektronenmikroskop öffnete das zweite Tor zum Mikrokosmos. Was werden wir finden wenn wir das dritte Tor öffnen?
as quoted by Nan Yao, director of the Imaging and Analysis Center at the Princeton Materials Institute, in the Princeton Weekly Bulletin, February 26, 2001, Vol. 90, No. 18 http://www.princeton.edu/~iac/pwb2_26b.html.

Final sentence of the novel, possibly addressing criticism of the author’s previous endings, Part 13, "Reconstitution"
Anathem (2008)

"The Minimal," ll. 1-2
The Lost Son and Other Poems (1948)

Pegasus, St. 3 & 4, p. 181
The New Book of Days (1961)
Context: He could not be captured,
He could not be bought,
His running was rhythm,
His standing was thought;
With one eye on sorrow
And one eye on mirth,
He galloped in heaven
And gambolled on earth. And only the poet
With wings to his brain
Can mount him and ride him
Without any rein,
The stallion of heaven,
The steed of the skies,
The horse of the singer
Who sings as he flies.

"A Match", line 1.
Poems and Ballads (1866-89)
Context: If love were what the rose is,
And I were like the leaf,
Our lives would grow together
In sad or singing weather,
Blown fields or flowerful closes,
Green pasture or gray grief;
If love were what the rose is,
And I were like the leaf.

Source: Kafka's Other Trial: The Letters to Felice

Source: Beauty Queens

As quoted in Funny Ladies: The Best Humor from America's Funniest Women (2001) by Bill Adler, p. 47