“You can’t make a rocket engine based on know-how—you need the ‘know-why’.”
In simple words, Nambi Narayanan is saying that just following steps is not enough to build something great. You must understand why things work, not just how they work. Only then can you truly create, improve and innovate.
This idea comes from his own experience in rocket science, where copying designs or instructions is never enough. Real knowledge comes from years of learning, testing and understanding the science behind every small part.
ABOUT NARAYAN
Nambi Narayanan was born on December 12, 1941, in Nagercoil, Tamil Nadu. He is an Indian aerospace engineer who worked with the Indian Space Research Organisation and played a key role in developing India’s liquid propulsion systems.
He was among the early scientists who helped India move towards more advanced rocket technology, especially in propulsion systems that power launch vehicles. His work contributed to strengthening India’s space capabilities at a time when the country was still building its foundation in space research.
He was awarded the Padma Bhushan in 2019, recognising his contribution to science and engineering.
Nambi Narayanan is known as a scientist who believed in deep understanding rather than surface-level learning. His approach was always focused on questioning, analysing and mastering the science behind technology.
His life also reflects strong resilience. In 1994, he was falsely accused in an espionage case, which affected both his career and India’s space programme. The case was later proven baseless, and he was cleared of all charges.
Despite this setback, he continued to be recognised for his scientific contributions and his role in shaping India’s rocket technology.
UNDERSTANDING THE QUOTE
The quote explains a very important idea in a simple way.
“Know-how” means knowing how to do something, like following instructions. But “know-why” means understanding the reason behind those instructions.
In rocket science, this difference is critical. As Narayanan explains in his book, even if someone is given full drawings of a rocket, they still cannot build it without deep understanding and years of experience.
This is because real innovation comes from understanding how systems behave, how problems arise and how they can be solved. Without that knowledge, progress stops.
This idea applies to everyday life too. Students who only memorise may pass exams, but those who understand concepts can solve new problems. In jobs, people who understand the “why” become better thinkers and decision-makers.
OTHER QUOTES BY NAMBI NARAYANAN
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Rocket secrets could not be transferred by paper.
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For us Indians who have to walk for 2 km to get 3 liters of drinking water, and use it between the two of us for 3 days, nothing is quite impossible.
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Insane, yes. But impossible, no.
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If you have the determination, I am sure you are bound to succeed and there is no reason for you to worry.
Nambi Narayanan’s words remind us that true success does not come from copying others, but from understanding deeply. Whether in science, studies or life, asking “why” is what leads to real growth.
His journey and his ideas continue to inspire people to think deeper, learn better and build something meaningful.
– Ends
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