Everything in nature is the result of fixed laws.
Charles DarwinRead
I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection.
Interpretation
Natural selection explains how useful variations in species are preserved over generations.
This quote by Charles Darwin encapsulates the idea of natural selection, a fundamental concept in evolutionary biology. It suggests that in nature, the variations among individuals that are advantageous for survival and reproduction are retained and passed on to future generations, leading to gradual adaptation and evolution of species over time.
In practice
In a biology class while discussing the principles of evolution.
Everything in nature is the result of fixed laws.
The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.
I am quite conscious that my speculations run beyond the bounds of true science....It is a mere rag of an hypothesis with as many flaw[s] & holes as sound parts.
We cannot fathom the marvelous complexity of an organic being; but on the hypothesis here advanced this complexity is much increased. Each living creature must be looked at as a microcosm--a little universe, formed of a host of self-propagating organisms, inconceivably minute and as numerous as the stars in heaven.
we are always slow in admitting any great change of which we do not see the intermediate steps
I am not the least afraid to die
It was not possible to formulate the laws of quantum mechanics in a fully consistent way without reference to the consciousness.
Nnothing tends more to the corruption of science than to suffer it to stagnate. These waters must be troubled, before they can exert their virtues.
I am not accustomed to saying anything with certainty after only one or two observations.
The Earth is round, and is inhabited on all sides, is insignificantly small, and is borne through the stars.
True science teaches us to doubt and, in ignorance, to refrain.
One day the world will look upon research upon animals as it now looks upon research on human beings.
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