QUESTION: Over the past decade, many physicists have been making an association between their science and "the mind of God". What do you think of this association being made?
MR. WEINBERG: It makes me nervous when physicists use the word "God" loosely, as talking about the laws of nature as the mind of God, or even Einstein's famous remarks about God playing dice with the cosmos. I think mostly they're just using the word "God" in the metaphorical sense.
By "God" most of them simply mean the laws of nature, the principles that govern everything. And, well, there's nothing wrong with the metaphor, I suppose, but the word "God" is charged with so much meaning, it carries so much historical freight, and I think one ought to be careful about how one uses it.
QUESTION: Why do you think so many physicists in recent years have made such an association?
MR. WEINBERG: It is true that this use of the word "God," this metaphorical use of the word "God" comes naturally to physicists. Theologian Paul Tellich said once that he thought that physicists were the only scientists that found it comfortable to talk about God.
The aim of physics, or at least one branch of physics, is after all to find the principles that explain the principles that explain the principles that explain everything we see in nature, to find the ultimate rational basis of the universe. And that gets fairly close in some respects to what people have associated with the word "God." But I think it is still very different. And I wouldn't refer to the laws of nature as the mind of God, or call anything discovered by physicists the âGod thisâ or the âGod thatâ. It's a word that has a lot of punch to it.
QUESTION: There are people who say that the very particularity of the laws of physics means these laws are "fine tuned" to allow for the possibility of life evolving. They interpret this in a religious sense as meaning that the universe was in some sense designed to produce life.
MR. WEINBERG: I don't see any clear evidence that the laws of nature or the constants of nature as we know them are fine tuned to allow life. I mean, certainly the laws of nature do allow life. But I don't see anything clearly in them that looks like a spectacular coincidence. I'm not convinced by any of those arguments.
There are some things that are quite mysterious in our understanding of nature as we know it now. There is a constant called the "cosmological constant", which if I didn't know anything I would make an estimate of what its magnitude would be just on the basis of guess work from what I know about the laws of nature. The correct value is less than that estimated value by something like 120 orders of magnitude. That looks like some kind of fine tuning. And we don't know. It may be that that number is simply zero, and it's zero for some fundamental reason that we will discover. And so it isn't fine tuned. It's also possible that the universe is bigger and more complicated than we had thought, and that what we call the universe, is just part of the universe, and that what we call the laws of nature differ from one part to another, and that we are living in a part of the universe where what we call the laws of nature, including the value of this constant, allow life to appear. In that case we wouldn't imagine that any supernatural agency fine tuned the laws and constants to make us possible, any more that we imagine that a supernatural agency arranged that the Earth had a temperature which allows life. Out there, there are doubtless millions of planets in the galaxy, and we live on one that allows life. That doesn't imply to me that it has been specially arranged to allow life.
http://www.pbs.org/faithandreason/transcript/wein-frame.html
There are however one or two scientists, maybe twenty, who think the universe is fine-tuned by "God" . I'm sure.