"New ideas pass through three periods: 1) It can't be done. 2) It probably can be done, but it's not worth doing. 3) I knew it was a good idea all along!"
About this Quote
The second stage is even more revealing because it concedes possibility while still blocking change. "It's not worth doing" is the language of risk committees, budget meetings, and status quo incentives. Clarke understands that resistance usually evolves; when denial collapses, it rebrands as cost-benefit analysis. That shift is the subtext: the debate is rarely about feasibility alone, it's about who pays the price of being early and who gets the credit for being right.
Then the final line flips into satire: "I knew it was a good idea all along!" It's a sharp little indictment of retrospective certainty, the way institutions rewrite their own histories once a disruptive idea becomes inevitable. Clarke, a science fiction writer who watched the 20th century turn speculation into infrastructure (satellites, computing, spaceflight), is naming a pattern he saw repeatedly: radical becomes obvious the moment it becomes profitable, safe, or prestigious.
The intent isn't just to cheer innovation. It's to warn innovators about the emotional weather they'll face, and to expose the quiet cowardice behind "common sense" when the future shows up early.
Quote Details
| Topic | Technology |
|---|---|
| Source | Help us find the source |
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Citation Formats
APA Style (7th ed.)
Clarke, Arthur C. (2026, January 18). New ideas pass through three periods: 1) It can't be done. 2) It probably can be done, but it's not worth doing. 3) I knew it was a good idea all along! FixQuotes. https://fixquotes.com/quotes/new-ideas-pass-through-three-periods-1-it-cant-be-6470/
Chicago Style
Clarke, Arthur C. "New ideas pass through three periods: 1) It can't be done. 2) It probably can be done, but it's not worth doing. 3) I knew it was a good idea all along!" FixQuotes. January 18, 2026. https://fixquotes.com/quotes/new-ideas-pass-through-three-periods-1-it-cant-be-6470/.
MLA Style (9th ed.)
"New ideas pass through three periods: 1) It can't be done. 2) It probably can be done, but it's not worth doing. 3) I knew it was a good idea all along!" FixQuotes, 18 Jan. 2026, https://fixquotes.com/quotes/new-ideas-pass-through-three-periods-1-it-cant-be-6470/. Accessed 21 Feb. 2026.










