„A man's reach must exceed his grasp or what's a metaphor?“
A play on the line's in Robert Browning's poem "Andrea del Sarto":
Ah, but a man's reach should exceed his grasp,
Or what's a heaven for?
Source: 1960s, Understanding Media (1964), p.7
Related quotes

„Ah, but a man's reach should exceed his grasp,
Or what's a heaven for?“
— Robert Browning, Men and Women
"Andrea del Sarto", line 98.
Men and Women (1855)
Source: Men and Women and Other Poems

— Isaac Watts English hymnwriter, theologian and logician 1674 - 1748
"False Greatness" in Horae Lyricae Book II (1706).
Compare: "I do not distinguish by the eye, but by the mind, which is the proper judge of the man", Seneca, On a Happy Life (L'Estrange's Abstract), chap. i
&: "It is the mind that makes the man, and our vigour is in our immortal soul", Attributed uncertainly to Ovid
1700s

„The superior man is modest in his speech, but exceeds in his actions.“
— James Legge missionary in China 1815 - 1897
Bk. 14, Ch. 29 (p. 208)
Translations, The Confucian Analects

„The superior man is modest in his speech, but exceeds in his actions.“
— Confucius Chinese teacher, editor, politician, and philosopher -551 - -479 BC
James Legge translation.
Variant translations: The superior man acts before he speaks, and afterwards speaks according to his actions.
The greater man does not boast of himself, But does what he must do.
A good man does not give orders, but leads by example.
The Analects, Chapter I, Chapter IV
Original: (zh_Hant) 君子欲訥於言而敏於行。

— Andrei Tarkovsky, book Sculpting in Time
Source: Sculpting in Time (1986), p. 192
Context: Art must must carry man's craving for the ideal, must be an expression of his reaching out towards it; that art must give man hope and faith. And the more hopeless the world in the artist's version, the more clearly perhaps must we see the ideal that stands in opposition — otherwise life becomes impossible! Art symbolises the meaning of our existence.
— Garry Davis American actor turned peace activist (1921-2013) 1921 - 2013
As quoted in Garry Davis Cult, Life (Jan 24, 1949)

„For to be wise and love exceeds man's might.“
— William Shakespeare, Troilus and Cressida
Source: Troilus and Cressida

— Ernest Shackleton, book South
Ch 10 : Across South Georgia; in this extract, Shackleton was paraphrasing the poem "The Call of the Wild" by Robert Service, published in 1907.
South (1920)
Context: At the bottom of the fall we were able to stand again on dry land. The rope could not be recovered. We had flung down the adze from the top of the fall and also the logbook and the cooker wrapped in one of our blouses. That was all, except our wet clothes, that we brought out of the Antarctic, which we had entered a year and a half before with well-found ship, full equipment, and high hopes. That was all of tangible things; but in memories we were rich. We had pierced the veneer of outside things. We had "suffered, starved and triumphed, groveled down yet grasped at glory, grown bigger in the bigness of the whole. We had seen God in His splendours, heard the text that Nature renders." We had reached the naked soul of man.

„Victory is within our ready grasp…We are in reach of a famous victory“
— Tony Abbott Australian politician 1957
"Abbott's 'famous victory' remark … was it gospel or not?" http://www.theage.com.au/national/abbotts-famous-victory-remark--was-it-gospel-or-not-20100623-ywq0.html in The Age, June 23, 2010.
2010

— Letitia Elizabeth Landon English poet and novelist 1802 - 1838
They require that sorrow should find a voice ; now the most soothing sympathy is that which guesses the suffering without a question.
No.7. Rob Roy — DIANA VERNON.
Literary Remains

— Thomas Aquinas, Summa Theologica
Part I, Question 1, Article 1; tr. Fathers of the English Dominican Province (1920, New York: Benziger Bros.)
Summa Theologica (1265–1274)

— George Chapman, The Conspiracy and Tragedy of Charles, Duke of Byron
Act III, scene i.
The Conspiracy and Tragedy of Charles, Duke of Byron (1608)