quarta-feira, 8 de outubro de 2008

Steven Weinberg: «Without God»

  • «(...) I do not think that the tension between science and religion is primarily a result of contradictions between scientific discoveries and specific religious doctrines. (...) The first source of tension arises from the fact that religion originally gained much of its strength from the observation of mysterious phenomena—thunder, earthquakes, disease—that seemed to require the intervention of some divine being. There was a nymph in every brook, and a dryad in every tree. But as time passed more and more of these mysteries have been explained in purely natural ways. (...)

  • Of course, not everything has been explained, nor will it ever be. The important thing is that we have not observed anything that seems to require supernatural intervention for its explanation. There are some today who cling to the remaining gaps in our understanding (such as our ignorance about the origin of life) as evidence for God. But as time passes and more and more of these gaps are filled in, their position gives an impression of people desperately holding on to outmoded opinions. (...) The problem for religious belief is not just that science has explained a lot of odds and ends about the world. There is a second source of tension: that these explanations have cast increasing doubt on the special role of man, as an actor created by God to play a starring part in a great cosmic drama of sin and salvation. We have had to accept that our home, the earth, is just another planet circling the sun; our sun is just one of a hundred billion stars in a galaxy that is just one of billions of visible galaxies; and it may be that the whole expanding cloud of galaxies is just a small part of a much larger multiverse, most of whose parts are utterly inhospitable to life. As Richard Feynman has said, "The theory that it's all arranged as a stage for God to watch man's struggle for good and evil seems inadequate." (...) A third source of tension between science and religious belief has been more important in Islam than in Christianity. Around 1100, the Sufi philosopher Abu Hamid al-Ghazzali argued against the very idea of laws of nature, on the grounds that any such law would put God's hands in chains. (...) There is a fourth source of tension between science and religion that may be the most important of all. Traditional religions generally rely on authority, whether the authority is an infallible leader, such as a prophet or a pope or an imam, or a body of sacred writings, a Bible or a Koran. Perhaps Galileo did not get into trouble solely because he was expressing views contrary to scripture, but because he was doing so independently, rather than as a theologian acting within the Church. Of course, scientists rely on authorities, but of a very different sort. If I want to understand some fine point about the general theory of relativity, I might look up a recent paper by an expert in the field. But I would know that the expert might be wrong. One thing I probably would not do is to look up the original papers of Einstein, because today any good graduate student understands general relativity better than Einstein did. We progress. (...) We have our heroes in science, like Einstein, who was certainly the greatest physicist of the past century, but for us they are not infallible prophets. (...) I have been emphasizing religious belief here, the belief in facts about God or the afterlife, though I am well aware that this is only one aspect of the religious life, and for many not the most important part. Perhaps I emphasize belief because as a physicist I am professionally concerned with finding out what is true, not what makes us happy or good. For many people, the important thing about their religion is not a set of beliefs but a host of other things: a set of moral principles; rules about sexual behavior, diet, observance of holy days, and so on; rituals of marriage and mourning; and the comfort of affiliation with fellow believers, which in extreme cases allows the pleasure of killing those who have different religious affiliations. (...) The various uses of religion may keep it going for a few centuries even after the disappearance of belief in anything supernatural, but I wonder how long religion can last without a core of belief in the supernatural, when it isn't about anything external to human beings. (...) Living without God isn't easy. But its very difficulty offers one other consolation—that there is a certain honor, or perhaps just a grim satisfaction, in facing up to our condition without despair and without wishful thinking—with good humor, but without God.» (Steven Weinberg na New York Review of books)

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