Dmitri Mendeleev — "Science which deals with the infinite is itself without bounds."
Science which deals with the infinite is itself without bounds.
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More from Dmitri Mendeleev
"The periodic law is the most important generalization in chemistry, and it has no equal in any other branch of science."
"Refrain from illusions, insist on work, and not on words, patiently search divine and scientific truth."
"It is the duty of the chemist to teach the world how to use the elements wisely."
"The knowledge of the properties of the elements is the foundation of all chemistry."
"The essence of chemistry lies not in the pursuit of knowledge alone, but also in the pursuit of truth."
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Understanding this quote
What it means
Knowledge expands endlessly because reality itself is inexhaustible. Every answer opens new questions, every discovery reveals deeper layers to investigate. Unlike practical crafts with fixed goals, science chases something that cannot be fully captured or completed. Its subject matter has no edge, so the work of studying it has no edge either. Progress does not mean reaching a finish line; it means pushing the horizon further out while accepting that more always remains beyond reach.
Relevance to Dmitri Mendeleev
Mendeleev organized the known elements into his 1869 periodic table, but deliberately left gaps and predicted undiscovered elements like gallium and germanium, later confirmed. He understood his system was a framework for endless future discovery, not a closed catalog. Beyond chemistry, he studied agriculture, petroleum, metrology, and economics, refusing to stay confined to one discipline. His career embodied the belief that scientific inquiry keeps branching outward as long as the universe keeps offering more to measure, classify, and understand.
The era
Nineteenth-century Russia was racing to catch Western Europe scientifically under reformist tsars. Mendeleev worked as new elements were discovered almost yearly, spectroscopy revealed stellar composition, and atomic theory was still contested. Darwin had unsettled biology, thermodynamics was reshaping physics, and industrial chemistry was exploding. Scientists felt they stood at the beginning of understanding matter rather than the end. Declaring science boundless matched the mood of an age where every decade overturned textbooks and the universe looked vastly larger than the previous generation believed.
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