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"The establishment of a law, moreover, does not take place when the first thought of it takes form, or even when its significance is recognised, but only when it has been confirmed by the results of the experiment."
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"Our Creator would never have made such lovely days, and have given us the deep hearts to enjoy them, above and beyond all thought, unless we were meant to be immortal."

"As the biggest library if it is in disorder is not as useful as a small but well-arranged one, so you may accumulate a vast amount of knowledge but it will be of far less value than a much smaller amount if you have not thought it over for yourself."

"I thought how unpleasant it is to be locked out; and I thought how it is worse, perhaps, to be locked in."

"I took thought, and invented what I conceived to be the appropriate title of 'agnostic'."

"A radical generally meant a man who thought he could somehow pull up the root without affecting the flower. A conservative generally meant a man who wanted to conserve everything except his own reason for conserving anything."

"A man's face as a rule says more, and more interesting things, than his mouth, for it is a compendium of everything his mouth will ever say, in that it is the monogram of all this man's thoughts and aspirations."

"An outree explanation, violating all our preconceptions, would never pass for a true account of a novelty. We should scratch round industriously till we found something less excentric."
Explore more quotes by Dmitri Mendeleev

"The magnitude of the atomic weight determines the character of the element, just as the magnitude of the molecule determines the character of a compound body."

"It is the function of science to discover the existence of a general reign of order in nature and to find the causes governing this order. And this refers in equal measure to the relations of man - social and political - and to the entire universe as a whole."

"Pleasures flit by - they are only for yourself; work leaves a mark of long-lasting joy, work is for others."

"I want you to have this feeling too - it is my moral responsibility to help you achieve this inner freedom."

"Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (eg. Pt, Ir, Os) or which increase regularly (eg. K, Ru, Cs)."

"We must expect the discovery of many as yet unknown elements-for example, elements analogous to aluminum and silicon- whose atomic weight would be between 65 and 75."
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