Courage is never to let your actions be influenced by your fears.
In my youth I regarded the universe as an open book, printed in the language of equations, whereas now it appears to me as a text written in invisible ink, of which in our rare moments of grace we are able to decipher a small segment.
Interpretation
What this quote means
This quote reflects the shift in perception from seeing the universe as entirely knowable through logic to recognizing the limitations of human understanding.
Arthur Koestler's quote illustrates the evolution of his understanding of the universe from a simplistic view where everything can be understood through equations and logic, to a more nuanced perspective where much remains mysterious and hidden. He suggests that while knowledge is attainable, it is only a fraction of the greater unknown, and only in rare moments of clarity do we grasp insights that may reveal deeper truths about existence.
Themes
In practice
Example use cases
This quote can be used in a lecture about the philosophy of science.
More from Arthur Koestler
All quotes →History knows no scruples and no hesitation. Inert and unnering flows towards her goal. History knows herway. She makes no mistakes.
If one looks with a cold eye at the mess man has made of his history, it is difficult to avoid the conclusion that he has been afflicted by some built-in mental disorder which drives him towards self-destruction. Murder within the species on an individual or collective scale is a phenomenon unknown in the whole animal kingdom, except for man, and a few varieties of ants and rats.
Space-ships and time machines are no escape from the human condition. Let Othello subject Desdemona to a lie-detector test; his jealousy will still blind him to the evidence. Let Oedipus triumph over gravity; he won't triumph over his fate.
The real achievement in discoveries... is seeing an analogy where no one saw one before... The essence of discovery is that unlikely marriage of cabbages and kings — of previously unrelated frames of reference or universes of discourse — whose union will solve the previously insoluble problem.
The most persistent sound which reverberates through man's history is the beating of war drums.
Similar quotes
We stand there, quiet. My questions all seem wrong: How did you get so old? Was it all at once, in a day, or did you peter out bit by bit? When did you stop having parties? Did everyone else get old too, or was it just you? Are other people still here, hiding in the palm trees or holding their breath underwater? When did you last swim your laps? Do your bones hurt? Did you know this was coming and hide that you knew, or did it ambush you from behind?
A pattern of shared basic assumptions invented, discovered, or developed by a given group as it learns to cope with its problems of external adaptation and internal integration that have worked well enough to be considered valid and therefore, to be taught to new members as the correct way to perceive, think and feel in relation to those problems.
Keep in mind that no matter how perfectly you get your life in order, you will never be rid of all your problems. Problems are a way of life, always have been, always will be. But how you elect to view those problems is all up to you.
He wondered how he could ever have thought of the planets, even of the Earth, as islands of life and reality floating in a deadly void. Now with a certainty which never after deserted him, he saw the planets - as mere holes or gaps in the living heaven - excluded and rejected wastes of heavy matter and murky air, formed not by addition to, but by subtraction from, the surrounding brightness.
You train yourself in the art of being mysterious to everyone. My dear friend! What if there were no one, who cared about guessing your riddle, what pleasure would you then take in it?
Pleasure is our first and kindred good. It is the starting point of every choice and of every aversion, and to it we always come back, inasmuch as we make feeling the rule by which to judge of every good thing.