The fear of failure has sabotaged many hopes and dreams.

“don't sabotage your own greatness by succumbing to failure!”

Terry McMillan book A Day Late and a Dollar Short

Source: A Day Late and a Dollar Short

“Fear kills more dreams than failure ever will.”

Jay Samit (1961) American businessman

Future Proofing You (2021)

“There is only one thing that makes a dream impossible to achieve: the fear of failure.”

Paulo Coelho book The Alchemist

The alchemist, p. 141.
Variant: There is only one thing that makes a dream impossible to achieve: the fear of failure.
Source: The Alchemist (1988)

“I use the words "unauthorized behavior" rather than "accident" because we must guard against many types of events— psychopathic or irrational individuals, mechanical or human failure, sabotage, irresponsible behavior, and so on.”

Herman Kahn (1922–1983) American futurist

The Magnum Opus; On Thermonuclear War

“The ancient commission of the writer has not changed. He is charged with exposing our many grievous faults and failures, with dredging up to the light our dark and dangerous dreams for the purpose of improvement.”

John Steinbeck (1902–1968) American writer

Nobel Prize acceptance speech (1962)
Context: Humanity has been passing through a gray and desolate time of confusion. My great predecessor, William Faulkner, speaking here, referred to it as a tragedy of universal fear so long sustained that there were no longer problems of the spirit, so that only the human heart in conflict with itself seemed worth writing about.
Faulkner, more than most men, was aware of human strength as well as of human weakness. He knew that the understanding and the resolution of fear are a large part of the writer's reason for being.
This is not new. The ancient commission of the writer has not changed. He is charged with exposing our many grievous faults and failures, with dredging up to the light our dark and dangerous dreams for the purpose of improvement.

“I have hoped as many hopes and dreamed so many dreams, seen them swept aside by weather, and blown away by men, washed away in my own mistakes, that — I use to wonder if it wouldn't be better just to haul off and quit hoping.”

Woody Guthrie (1912–1967) American singer-songwriter and folk musician

"Notes about Music" (29 March 1946) http://web.archive.org/19991001055247/www.geocities.com/Nashville/3448/music.html also quoted in A Race of Singers: Whitman's Working-Class Hero from Guthrie to Springsteen (2000) by Bryan K. Garman, p. 244
Context: I have hoped as many hopes and dreamed so many dreams, seen them swept aside by weather, and blown away by men, washed away in my own mistakes, that — I use to wonder if it wouldn't be better just to haul off and quit hoping. Just protect my own inner brain, my own mind and heart, by drawing it up into a hard knot, and not having any more hopes or dreams at all. Pull in my feelings, and call back all of my sentiments — and not let any earthly event move me in either direction, either cause me to hate, to fear, to love, to care, to take sides, to argue the matter at all — and, yet … there are certain good times, and pleasures that I never can forget, no matter how much I want to, because the pleasures, and the displeasures, the good times and the bad, are really all there is to me.
And these pleasures that you cannot ever forget are the yeast that always starts working in your mind again, and it gets in your thoughts again, and in your eyes again, and then, all at once, no matter what has happened to you, you are building a brand new world again, based and built on the mistakes, the wreck, the hard luck and trouble of the old one.