“We must hold fast to the dream that reason will prevail.”
Though sometimes quoted as if he were author of it, the expression "Only those who see the invisible can do the impossible" is one that greatly predates Lown's use of it; it has also been attributed to Thomas Jefferson, Jesus and Mrs. Charles E. Cowman, but the earliest published expression yet located seems to have been one by American Baptist minister Rev. Robert Stuart MacArthur in Royal Messages of Cheer and Comfort Beautifully Told (1909) edited by Sarah Conger Robinson, p. 58
A Prescription for Hope (1985)
Context: We must hold fast to the dream that reason will prevail. The world today is full of anguish and dread. As great as is the danger, still greater is the opportunity. If science and technology have catapulted us to the brink of extinction, the same ingenuity has brought humankind to the boundary of an age of abundance.
Never before was it possible to feed all the hungry. Never before was it possible to shelter all the homeless. Never before was it possible to teach all the illiterates. Never before were we able to heal so many afflictions. For the first time science and medicine can diminish drudgery and pain.
Only those who see the invisible can do the impossible. But in order to do the impossible, in the words of Jonathan Schell, we ask "not for our personal survival: we ask only that we be survived. We ask for assurance that when we die as individuals, as we know we must, mankind will live on".
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Bernard Lown 23
American cardiologist developer of the DC defibrillator and… 1921–2021Related quotes

“Hold fast to dreams
For if dreams die
Life is a broken-winged bird
That cannot fly.”
"Dreams," from the anthology Golden Slippers: An Anthology of Negro Poetry for Young Readers, ed. Arna Bontemps (1941)

Source: The Light of Day (1900), Ch. III: Science and Theology

Letter to Benjamin Waterhouse (19 July 1822), published in The Works of Thomas Jefferson in Twelve Volumes http://oll.libertyfund.org/ToC/0054.php, Federal Edition, Paul Leicester Ford, ed., New York: G. P. Putnam's Sons, 1904, Vol. 12 http://oll.libertyfund.org/Texts/Jefferson0136/Works/0054-12_Bk.pdf, p. 244
1820s

Explaining Jim Crow laws to his daughters, in The Luminous Darkness : A Personal Interpretation of the Anatomy of Segregation and the Ground of Hope (1989), p. 71

“Reason nevertheless prevails in world history.”
Comments on the North American Events (1862)

“Never think that God's delays are God's denials. Hold on; hold fast; hold out. Patience is genius.”
As quoted in New Cyclopædia of Illustrations (1870) by Elon Foster, p. 492

2015, Speech: Declaration as Vice Presidential Candidate

Socrates, p. 35
L'Âme et la danse (1921)