Top 15 Ernst Haeckel Quotes (2024 Update)

Ernst Haeckel Quote: “Man is not above nature, but in nature.”

1. “Man is not above nature, but in nature.”

— Ernst Haeckel

Ernst Haeckel Quote: “Nothing is constant but change! All existence is a perpetual flux of “being and becoming!” That is the broad lesson of the evolution of the world.”

2. “Nothing is constant but change! All existence is a perpetual flux of “being and becoming!” That is the broad lesson of the evolution of the world.”

— Ernst Haeckel

Ernst Haeckel Quote: “By ecology we understand the total science of the connections of the organism to the surrounding external world.”

3. “By ecology we understand the total science of the connections of the organism to the surrounding external world.”

— Ernst Haeckel

Ernst Haeckel Quote: “The cell never acts; it reacts.”

4. “The cell never acts; it reacts.”

— Ernst Haeckel

Ernst Haeckel Quote: “Ontogeny re-capitulates phylogeny.”

5. “Ontogeny re-capitulates phylogeny.”

— Ernst Haeckel

Ernst Haeckel Quote: “Mental differences between the lowest men and the animals are less than those between the lowest and the highest man.”

6. “Mental differences between the lowest men and the animals are less than those between the lowest and the highest man.”

— Ernst Haeckel

Ernst Haeckel Quote: “Politics is applied biology.”

7. “Politics is applied biology.”

— Ernst Haeckel

Ernst Haeckel Quote: “Civilization and the life of nations are governed by the same laws as prevail throughout nature and organic life.”

8. “Civilization and the life of nations are governed by the same laws as prevail throughout nature and organic life.”

— Ernst Haeckel

Ernst Haeckel Quote: “Among the Spartans all newly born children were subject to a careful examination or selection. All those that were weak, sickly, or affected with any bodily infirmity, were killed. Only the perfectly healthy and strong children were allowed to live, and they alone afterwards propagated the race.”

9. “Among the Spartans all newly born children were subject to a careful examination or selection. All those that were weak, sickly, or affected with any bodily infirmity, were killed. Only the perfectly healthy and strong children were allowed to live, and they alone afterwards propagated the race.”

— Ernst Haeckel

Ernst Haeckel Quote: “The real cause of personal existence is not the favor of the Almighty, but the sexual love of one’s earthly parents.”

10. “The real cause of personal existence is not the favor of the Almighty, but the sexual love of one’s earthly parents.”

— Ernst Haeckel

Ernst Haeckel Quote: “The nucleus has to take care of the inheritance of the heritable characters, while the surrounding cytoplasm is concerned with accommodation or adaptation to the environment.”

11. “The nucleus has to take care of the inheritance of the heritable characters, while the surrounding cytoplasm is concerned with accommodation or adaptation to the environment.”

— Ernst Haeckel

Ernst Haeckel Quote: “Thus for Haeckel, to know is not to conceptualize but to see. What nature is, is visible on its surface.”

12. “Thus for Haeckel, to know is not to conceptualize but to see. What nature is, is visible on its surface.”

— Ernst Haeckel

Ernst Haeckel Quote: “In the course of individual development, inherited characters appear, in general, earlier than adaptive ones, and the earlier a certain character appears in ontogeny, the further back must lie in time when it was acquired by its ancestors.”

13. “In the course of individual development, inherited characters appear, in general, earlier than adaptive ones, and the earlier a certain character appears in ontogeny, the further back must lie in time when it was acquired by its ancestors.”

— Ernst Haeckel

Ernst Haeckel Quote: “Both of these branches of evolutionary science, are, in my opinion, in the closest causal connection; this arises from the reciprocal action of the laws of heredity and adaptation.”

14. “Both of these branches of evolutionary science, are, in my opinion, in the closest causal connection; this arises from the reciprocal action of the laws of heredity and adaptation.”

— Ernst Haeckel

Ernst Haeckel Quote: “An irrefutable proof that such single-celled primaeval animals really existed as the direct ancestors of Man, is furnished according to the fundamental law of biogeny by the fact that the human egg is nothing more than a simple cell.”

15. “An irrefutable proof that such single-celled primaeval animals really existed as the direct ancestors of Man, is furnished according to the fundamental law of biogeny by the fact that the human egg is nothing more than a simple cell.”

— Ernst Haeckel

Ernst Haeckel Quote: “Where faith commences, science ends. Both these arts of the human mind must be strictly kept apart from each other. Faith has its origin in the poetic imagination; knowledge, on the other hand, originates in the reasoning intelligence of man. Science has to pluck the blessed fruits from the tree of knowledge, unconcerned whether these conquests trench upon the poetical imaginings of faith or not.”

16. “Where faith commences, science ends. Both these arts of the human mind must be strictly kept apart from each other. Faith has its origin in the poetic imagination; knowledge, on the other hand, originates in the reasoning intelligence of man. Science has to pluck the blessed fruits from the tree of knowledge, unconcerned whether these conquests trench upon the poetical imaginings of faith or not.”

— Ernst Haeckel

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