“But then history was made by fools.”

Pt. I, ch. 3
Under Western Eyes (1911)

Words reportedly said to his physician in his final days, but not his last words, as quoted in Our Lord Don Quixote : The Life of Don Quixote and Sancho, with Related Essays (1967) by Miguel de Unamuno, as translated by Anthony Kerrigan, p. 386
The exact word used by Bolívar in Spanish is "majadero", whose meaning is "a person who insists with inopportune obstinacy in a pretension."
Variant translations or versions:
The three greatest fools of history have been Jesus Christ, Don Quixote — and I!
As quoted in Simón Bolívar and Spanish American Independence, 1783-1830 (1968) by John J. Johnson and Doris M. Ladd, p. 115
The three greatest idiots in history, have been Jesus Christ, Don Quixote, and myself.
As quoted in Nineteenth-century Gallery : Portraits of Power and Rebellion (1970) by Stanley Edward Ayling, p. 122
In the course of history, there have been three radicals: Jesus Christ, Don Quixote, and... me.
The three biggest fools in the world have been Jesus Christ, Don Quixote, and... me.
Jesus Christ, Don Quixote and I: three greatest fools of history.
We have sewn the sea — Jesus Christ, Don Quixote and me: the three great fools of history...
I’ve been plowing in the sea. Jesus Christ, Don Quixote and I — the three great mavericks of history.
Source: http://dle.rae.es/srv/fetch?id=NwsNlzj

AJENCIS, THE THIRD ANALYTIC OF MEN.
The White Luck Warrior (2011)

Source: The Taming of the Shrew

"Trees" - This poem was first published in Poetry: A Magazine of Verse Vol. 2 (August 1913). The first two lines were first written down on the 2nd of February 1913.
Trees and Other Poems (1914)
Context: I think that I shall never see
A poem lovely as a tree.
A tree whose hungry mouth is prest
Against the earth's sweet flowing breast;
A tree that looks at God all day,
And lifts her leafy arms to pray;
A tree that may in Summer wear
A nest of robins in her hair;
Upon whose bosom snow has lain;
Who intimately lives with rain.
Poems are made by fools like me,
But only God can make a tree.

Book III, Ch. 8
This quote is a paraphrase of a lengthier statement, as follows: We ordinarily see, in the actions of the world, that Fortune, to shew us her power in all things, and who takes a pride in abating our presumption, seeing she could not make fools wise, has made them fortunate in emulation of virtue; and most favours those operations the web of which is most purely her own; whence it is that the simplest amongst us bring to pass great business, both public and private; and, as Seiramnes, the Persian, answered those who wondered that his affairs succeeded so ill, considering that his deliberations were so wise, ‘that he was sole master of his designs, but success was wholly in the power of fortune’; these may answer the same, but with a contrary turn.
From Essays of Michel de Montaigne, translated by Charles Cotton (1877), Book the Third, Chapter VIII — Of The Art Of Conference. Note : this is the version found at Project Gutenberg.
Attributed

"Letter to Mr. Clifford, on his Human Reason"; cited from The Works of His Grace, George Villiers, the Duke of Buckingham (London: T. Evans, 1770) vol. 2, p. 105.
Variant (modernized spelling): The world is made up, for the most part, of fools and knaves, both irreconcilable foes to truth.

The Quagma Datum (p. 201)
Short fiction, Vacuum Diagrams (1997)