“It is all falling indelibly into the past.”

Source: The Man Who Folded Himself (1973), p. 100

"The White Goddess," lines 18–22, from Poems and Satires (1951).
Poems
Context: But we are gifted, even in November,
Rawest of seasons, with so huge a sense
Of her nakedly worn magnificence
We forget cruelty and past betrayal,
Heedless of where the next bright bolt may fall.

As translated in The Rambler No. 8 http://etext.lib.virginia.edu/etcbin/toccer-new2?id=Joh1Ram.sgm&images=images/modeng&data=/texts/english/modeng/parsed&tag=public&part=8&division=div1 (14 April 1750) by Samuel Johnson
Let not sleep e'er close thy eyes
Without thou ask thyself: What have I omitted and what done?
Abstain thou if 'tis evil; persevere if good.
As translated by Fabre d'Olivet
Do not let sleep close your tired eyes until you have three times gone over the events of the day. 'What did I do wrong? What did I accomplish? What did I fail to do that I should have done?' Starting from the beginning, go through to the end. Then, reproach yourself for the things you did wrong, and take pleasure in the good things you did.
As quoted in Divine Harmony: The Life and Teachings of Pythagoras by John Strohmeier and Peter Westbrook. (1999)
The Golden Verses
Context: Let not sleep fall upon thy eyes till thou has thrice reviewed the transactions of the past day. Where have I turned aside from rectitude? What have I been doing? What have I left undone, which I ought to have done? Begin thus from the first act, and proceed; and, in conclusion, at the ill which thou hast done, be troubled, and rejoice for the good.

As quoted in the Sunday Mail, Glasgow.

"On the Same" (On a Sundial II)
Sonnets and Verse (1938)

Book II
Rebel of the Underground (2013)

cubs refers sneering to the Cubists
as quoted in Futurism, ed. Didier Ottinger; Centre Pompidou / 5 Continents Editions, Milan, 2008.
1912, Boccioni's 'Sculptural Manifesto', 1912,