Jean-Baptiste Lamarck Quotes

18 quotes in 448 categories

• After having produced aquatic animals of all ranks and having caused extensive variations in them by the different environments provided by the waters, nature led…
• In every animal which has not passed the limit of its development, a more frequent and continuous use of any organ gradually strengthens, develops and…
• However, if we consider that all the characteristics which have been cited are only differences in degree of structure, may we not suppose that this…
• One must believe that every living thing whatsoever must change insensibly in its organization and in its form... One must therefore never expect to find…
• All the acquisitions or losses wrought by nature on individuals, through the influence of the environment in which their race has long been placed, and…
• The great age of the earth will appear greater to man when he understands the origin of living organisms and the reasons for the gradual…
• It is not the organs-that is, the character and form of the animal's bodily parts-that have given rise to its habits and particular structures. It…
• What nature does in the course of long periods we do every day when we suddenly change the environment in which some species of living…
• A sound Physics of the Earth should include all the primary considerations of the earth's atmosphere, of the characteristics and continual changes of the earth's…
• Life, in a body whose order and state of affairs can make it manifest, is assuredly, as I have said, a real power that gives…
• It is not enough to discover and prove a useful truth previously unknown, but that it is necessary also to be able to propagate it…
• Now this circumscribed power, which we have scarcely examined, scarcely studied, this power to whose actions we nearly always attribute an intention and a goal,…
• On our planet, all objects are subject to continual and inevitable changes which arise from the essential order of things. These changes take place at…
• All known living bodies are sharply divided into two special kingdoms, based upon the essential differences which distinguish animals from plants, and in spite of…
• All knowledge that is not the real product of observation, or of consequences deduced from observation, is entirely groundless and illusory.
• The form follows the function.
• It is not always the magnitude of the differences observed between species that must determine specific distinctions, but the constant preservation of those differences in…
• Habits form a second nature.

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