“A sledgehammer breaks glass but forges steel.”
"We do not change our course" (1938)
Help us to complete the source, original and additional information
Leon Trotsky 106
Marxist revolutionary from Russia 1879–1940Related quotes
Science is a very adversarial activity! Hence the old adage among physicists: Physics is a contact sport.
Chapter 2 "The Nature of Science" (p. 43)
What's the Worst That Could Happen?: A Rational Response to the Climate Change Debate (2009)

“My poems please the brave:
My poems, short and sincere,
Have the force of steel
Which forges swords.”
Source: Simple Verses (1891), V

“Nothing breaks more quickly than corroded steel.”
Book One, Part III “The Crimson Palace”, Chapter 6 (p. 155)
Quest for the White Witch (1978)

“Steel on the skyline
Sky made of glass
Made for a real world
All things must pass”
"Heathen (The Rays)"
Song lyrics, Heathen (2002)
Context: Steel on the skyline
Sky made of glass
Made for a real world
All things must pass
Ooo
Waiting for something
Looking for someone
Is there no reason?

“Maybe the ghosts have a glass ceiling? Break through that glass ceiling ghosts! I plan to.”
Ghost Hunters. October 31, 2006.
In reference to moving up the World Wrestling Entertainment roster, despite a lack of a conventional wrestling physique.
Ghost Hunters

Source: The Rose and the Beast: Fairy Tales Retold

“I'm not an alarmist, but someone should break the glass, and pull that red T-Lever down!”
Lyrics, Light Grenades (2006)