Nature is relentless and unchangeable, and it is indifferent as to whether its hidden reasons and actions are understandable to man or not.
Sentiment: NEGATIVE
To explain all nature is too difficult a task for any one man or even for any one age. 'Tis much better to do a little with certainty & leave the rest for others that come after you.
Perhaps we too seldom reflect how much the life of Nature is one with the life of man, how unimportant or indeed merely seeming, the difference between them.
To me there is nothing that goes against nature. If it seems incomprehensible, it's only because we haven't been able to understand it yet.
I think human nature is eternal and constant.
Nature... is nothing but the inner voice of self-interest.
In the end, nature is inexorable: it has no reason to hurry and, sooner or later, it takes what belongs to it. Unconsciously and inflexibly obedient to its own laws, it doesn't know art, just as it doesn't know freedom, just as it doesn't know goodness.
One of the things I believe in is a sense of human nature.
Human passions, like the forces of nature, are eternal; it is not a matter of denying their existence, but of assessing them and understanding them. Like the forces of nature, they can be subjected to man's deliberate act of will and be made to work in harmony with reason.
Real progress in understanding nature is rarely incremental. All important advances are sudden intuitions, new principles, new ways of seeing.
It can't be Nature, for it is not sense.