That night I knew the world was headed for trouble." - Meaning and context.">
On the experiment at University of Chicago which indicated a nuclear chain reaction was possible, as quoted in "Some Szilardisms on War, Fame, Peace", LIFE‎ magazine, Vol. 51, no. 9 (1 September 1961), p. 79
• Variants:
• We turned the switch, we saw the flashes, we watched them for about ten minutes — and then we switched everything off and went home. That night I knew the world was headed for sorrow...
 • As quoted in the Boston University Graduate Journal (1968)
• We turned the switch, saw the flashes, watched for ten minutes, then switched everything off and went home. That night I knew the world was headed for sorrow.
 • As quoted in The Making Of The Atomic Bomb (1986) by Richard Rhodes
“

All we had to do was lean back, turn a switch and watch a screen of a television tube. If flashes of light appeared on the screen it would mean that liberation of atomic energy would take place in our lifetime. We turned the switch, saw the flashes — we watched for about five minutes — then switched everything off and went home. That night I knew the world was headed for trouble.

— Leó Szilárd

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "All we had to do was lean back, turn a switch and watch a screen of a television tube. If flashes of light appeared on the screen it would mean that liberation of atomic energy would take place in our lifetime. We turned the switch, saw the flashes — we watched for about five minutes — then switched everything off and went home. That night I knew the world was headed for trouble." in the context of "On the experiment at University of Chicago which indicated a nuclear chain reaction was possible, as quoted in "Some Szilardisms on War, Fame, Peace", LIFE‎ magazine, Vol. 51, no. 9 (1 September 1961), p. 79
• Variants:
• We turned the switch, we saw the flashes, we watched them for about ten minutes — and then we switched everything off and went home. That night I knew the world was headed for sorrow...
 • As quoted in the Boston University Graduate Journal (1968)
• We turned the switch, saw the flashes, watched for ten minutes, then switched everything off and went home. That night I knew the world was headed for sorrow.
 • As quoted in The Making Of The Atomic Bomb (1986) by Richard Rhodes" to mean that wisdom is timeless.

Source: Wikiquote: "Leó Szilárd" (Quotes) The 'What it means' explanation text was generated by Google Gemini Flash (accessed January 18, 2026). https://gemini.google.com/app
Leó Szilárd

About Leó Szilárd

Leó Szilárd (11 February 1898 – 30 May 1964) was a Hungarian-American physicist, and probably the first scientist to take seriously the idea of actually developing atomic bombs; he drafted the famous letter sent by Albert Einstein to U.S. President Franklin Delano Roosevelt that was largely responsible for initiating the Manhattan Project to develop nuclear weapons during World War II.