Conception Quote by Francois Jacob
“Contrary to what I once thought, scientific progress did not consist simply in observing, in accurately formulating experimental facts and drawing up a theory from them. It began with the invention of a possible world, or a fragment thereof, which was then compared by experimentation with the real world. And it was this constant dialogue between imagination and experiment that allowed one to form an increasingly fine-grained conception of what is called reality.”
About This Quote
Source Book: The Structure of Scientific Revolutions, Thomas S. Kuhn, 1962
Scientific progress arises from imaginative models tested against reality, not just passive observation.
In simple terms: Science advances by creating and testing imagined worlds.
Embrace imagination, then experiment.
Themes
Mood
Type
When to use this quote
- research labs
- product development
- policy design
- education curricula
Key Concepts
Questions to Reflect On
- How do you balance creative speculation with rigorous testing?
- What imagined models have reshaped your field?
Imagination alone cannot replace empirical validation.