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Being self-taught, he had not known that astronomers were expected to focus on the solar system. Instead, he explored the construction of the universe, and it was on later generations that the questions he asked and the methods he devised to answer them were to have profound influence.
--
Michael Hoskin, ‘Herschel, William (1738–1822)’, Oxford Dictionary of National Biography, Oxford University Press, 2004

 

William Herschel

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We're constantly being asked all sorts of very profound questions. But we're not very profound people. People say, 'What do you think of the H-bomb, of religion, of fan worship?' But we didn't really start thinking about these things until people asked us. And even then we didn't get much time to consider them. What do I think of the H-bomb? Well, here's an answer with the full weight of five O levels and one A level behind it: I don't agree with it.

 

Paul McCartney

 

But we don't yet know whether the Universe is open or closed. More than that, there are a few astronomers who doubt that the redshift of distant galaxies is due to the doppler effect, who are skeptical of the expanding Universe and the Big Bang. Perhaps our descendants will regard our present ignorance with as much sympathy as we feel to the ancients for not knowing the Earth went around the Sun. If the general picture, however, of a Big Bang followed by an expanding Universe is correct, what happened before that? Was the Universe devoid of all matter and then the matter suddenly somehow created, how did that happen? In many cultures, the customary answer is that a God or Gods created the Universe out of nothing. But if we wish to pursue this question courageously, we must of course ask the next question: where did God come from? If we decide that this is an unanswerable question, why not save a step and conclude that the origin of the Universe is an unanswerable question? Or, if we say that God always existed, why not save a step, and conclude that the Universe always existed? That there's no need for a creation, it was always here. These are not easy questions. Cosmology brings us face to face with the deepest mysteries, questions that were once treated only in religion and myth.

 

Carl Sagan

 

At puberty, the elements of an unsuperstitious sexual morality ought to be taught. Boys and girls should be taught that nothing can justify sexual intercourse unless there is mutual inclination... Boys and girls should be taught respect for each other's liberty; they should be made to feel that nothing gives one human being rights over another, and that jealousy and possessiveness kill love. They should be taught that to bring another human being into the world is a very serious matter, only to be undertaken when the child will have a reasonable prospect of health, good surroundings, and parental care. But they should also be taught methods of birth control, so as to insure that children shall only come when they are wanted. Finally, they should be taught the dangers of venereal disease, and the methods of prevention and cure. The increase of human happiness to be expected from sex education on these lines is immeasurable.

 

Bertrand Russell

 

Those who are concerned with the arts are often asked questions, not always sympathetic ones, about the use or value of what they are doing. It is probably impossible to answer such questions directly, or at any rate to answer the people who ask them.

 

Northrop Frye

 

A year ago, we all were united in the joy over having broken free of totalitarianism. Today we all are made somewhat nervous by the burden of freedom. Our society is still in a state of shock. This shock could have been expected, but none of us expected it to be so profound. The old system collapsed, and a new one so far has not been built. Our social life is marked by a subliminal uncertainty over what kind of system we are going to build, how to build it, and whether we are able to build it at all.

 

Vaclav Havel