Science is a way to not fool ourselves.
Carl SaganRead
Perhaps, in retrospect, there would be little motivation even for malevolent extraterrestrials to attack the Earth; perhaps, after a preliminary survey, they might decide it is more expedient just to be patient for a little while and wait for us to self-destruct.
Interpretation
The quote suggests that extraterrestrials may find it unnecessary to invade Earth, as humanity's self-destructive tendencies might ultimately lead to its own downfall.
Carl Sagan's quote reflects on humanity's capacity for self-destruction and posits that, from an external perspective, it may be more logical for advanced extraterrestrial beings to observe rather than engage. It implies that our own actions might lead to our ruin, making intervention unnecessary, as we may achieve our end without outside help.
In practice
This quote could be used in a panel discussion about humanity's impact on the planet.
Science is a way to not fool ourselves.
In more than one respect, the exploring of the Solar System and homesteading other worlds constitutes the beginning, much more than the end, of history.
How smart does a chimpanzee have to be before killing him constitutes murder?
The hole in the ozone layer is a kind of skywriting. At first it seemed to spell out our continuing complacency before a witch's brew of deadly perils. But perhaps it really tells of a newfound talent to work together to protect the global environment.
There is a reward structure in science that is very interesting: Our highest honors go to those who disprove the findings of the most revered among us. So Einstein is revered not just because he made so many fundamental contributions to science, but because he found an imperfection in the fundamental contribution of Isaac Newton.
The simplest thought, like the concept of the number one, has an elaborate logical underpinning.
Let's all understand that these guiding principles cannot be discarded for short-term political gains. They represent what this country is all about. They are indigenous to the American idea. And these are principles which are not negotiable.
A man may have to die for our country: but no man must, in any exclusive sense, live for his country. He who surrenders himself without reservation to the temporal claims of a nation, or a party, or a class is rendering to Caesar that which, of all things, most emphatically belongs to God: himself.
Forget everything you've ever learned about the stars and they'll once more be transformed into angels, or into children, or into whatever you want to believe at that moment. It won't make you more stupid - after all, it's only a game - but it could enrich your life.
Deep down, there is in the substance of the cosmos a primordial disposition, sui generis, for self-arrangement and self-involution.
If you realize that all things change, there is nothing you will try to hold on to. If you are not afraid of dying, there is nothing you cannot achieve
There is no more cruel illusion than that war makes a people richer.
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