Francis Crick — "If you want to understand function, study structure."
If you want to understand function, study structure.
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More from Francis Crick
"The ultimate aim of the modern movement in biology is in fact to explain all biology in terms of physics and chemistry."
"I am an atheist, and I don't believe in God."
"The greatest obstacle to discovery is not ignorance, but the illusion of knowledge."
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Understanding this quote
What it means
The quote argues that to grasp how something works, you should first examine how it is built. Form and function are inseparable: the shape, parts, and arrangement of a thing reveal the rules governing what it does. Rather than guessing about behavior from the outside, look at the underlying architecture. Once you map the components and their geometry, the mechanism that drives activity becomes visible, often inevitable, in the structure itself.
Relevance to Francis Crick
Crick lived this principle. With James Watson he solved DNA's double-helix structure in 1953, and the moment they saw the complementary base pairing, the function—how genetic information copies and passes between generations—became obvious. He repeated the approach across his career, from the genetic code to neuroscience, where he later argued that consciousness would be cracked by mapping the brain's wiring and cell types, not by abstract theorizing.
The era
Mid-twentieth-century biology was shifting from descriptive natural history to molecular mechanism. X-ray crystallography, electron microscopy, and biochemistry were finally letting researchers see proteins, viruses, and nucleic acids at atomic scale. Crick's 1953 breakthrough, alongside Pauling's protein work and Perutz and Kendrew's hemoglobin studies, launched molecular biology and proved that structural detail unlocked questions classical genetics could only frame. The reductionist, structure-first program he championed defined the field for the next half century.
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