“What is meant by 'mingling' is the spirit of advancing and becoming engaged with the enemy, and not withdrawing even one step. You must understand this.”

This is sometimes attributed to Sun Tzu in combination with the above quote, as well as alone, but it too has not been sourced to any published translation of The Art of War, though it is similar in concept to his famous statement in Ch. 3 : "It is said that if you know your enemies and know yourself, you will not be imperiled in a hundred battles..."
Misattributed

Source: A Song for Arbonne

infinity plus interview (2001)
Context: I was always intensely Romantic, even when I was too young to understand what that meant. But Romanticism has its dark side, as any Romantic soon discovers... which is where the melancholy comes in, I suppose. I don't know if this is a matter of artistic influences so much as it is of temperament. But there's always been something in a twilight that moves me, and a sunset speaks to me in a way that no sunrise ever has.

Introduction
Leaves Of Morya's Garden (1924 - 1925), Book II : Illumination (1925)
Context: One must manifest discipline of spirit; without it one cannot become free. To the slave discipline of spirit will be a prison; to the liberated one it will be a wondrous healing garden. So long as the discipline of spirit is as fetters the doors are closed, for in fetters one cannot ascend the steps.
One may understand the discipline of spirit as wings.

Paul Auster, Oracle Night, New York: Henry Holt and Company, p. 168.
Oracle Night (2003)

Debate fallout: GOP suspends partnership with NBC http://www.washingtonexaminer.com/debate-fallout-gop-suspends-debate-partnership-with-nbc/article/2575337 (October 30, 2015)

Go Rin No Sho (1645), The Fire Book