A scientist speaks of rainbows
One of the most interesting books to come out during the past ten
years is Richard Dawkins's Unweaving the Rainbow: Science, Delusion
and the Appetite for Wonder. (Boston: Mariner Books, 1998). The
title refers to a complaint from the poet John Keats that Sir Isaac
Newton's work on optics was taking the mystery out of such beautiful
events as rainbows. Dawkins argues that science actually adds mystery
to life, because science never stops asking questions and never stops
probing deeper. Religion, he suggests, is more prone to closing
inquiry by giving answers, often superficial and inadequate ones, and
discouraging further questioning. By way of illustrating how
interesting scientific accounts can be, he offers a brief account of
the optics that account for rainbows (pp. 45-49). Anyone who wishes to
read that can borrow or buy the book. What I would like to do is not
recapitulate the physics of rainbows but to take rainbows as a point
of departure for discussing light poetically as a religious
metaphor.
Where on earth is a rainbow?
One of the most interesting things to ask oneself about a rainbow
is: where exactly is it? In thinking about this, consider that if one
watches a rainbow from a fast-moving vehicle, the rainbow seems always
to be about the same distance from the observer. This suggests that
the rainbow is moving at the same speed as the observer. Now imagine
that one is looking at a rainbow from a fast-moving train and passes a
farmer who is standing in his field and looking at the rainbow. The
farmer sees a rainbow that is standing still, and the person on the
train sees a rainbow that is moving. Are they both looking at the same
rainbow? If so, how can the same rainbow be simultaneously moving at
the speed of the train and standing still?
Now consider what happens if one walks (or runs or drives very
fast) toward a rainbow. The rainbow backs away. It always seems to be
at exactly the same distance from the observer. What if, instead of
one observer moving toward the rainbow, we had a hundred observers
placed at a distance of one meter from one another. Each of them would
see a rainbow that seems to be at a distance of, say, five kilometers
away. (When one really thinks about it, it is quite difficult to
estimate just how far away a rainbow appears to be. When I look at a
rainbow from my house, it seems to be somewhere in front of the Sandia
Mountains, and I know the crest of the Sandias is about 15 kilometers
from my house, so presumably the rainbow seems to be closer than
that.) Now if one hundred observers each see a rainbow that is five
kilometers away, then either there is one rainbow located in one
hundred different places, or there are one hundred rainbows, all but
one of which remains hidden to each observer.
The way out of these problems seems to be to admit that each observer sees his or her own rainbow. And this would suggest that a rainbow is not located on the earth or in the sky at all. Perhaps, like the second moon one sees when one's eyes are not properly focused, it is not located anywhere at all. If it is anywhere, it could be in the eye (or mind) of the observer.
It is not, however, entirely satisfactory to say that a rainbow is merely in the eye (or mind) of the beholder. A rainbow does not appear to the beholder no matter which way she happens to be looking. The rainbow appears to an observer only if she is situated in a particular way relative to the sun. (More about this in a moment.) So the rainbow is not an internal visualization that one projects willy nilly onto an empty sky in the way that a Buddhist meditator might project an image of Amitabha Buddha onto a clear blue sky or a sunset. Where is that rainbow?
I love questions much more than answers, so I am not even going to try to answer the question of where the rainbow is. But let me return just for a moment to the question of where the observer has to be situated relative to the sun in order to see a rainbow. When the sun is still in the eastern part of the sky, the rainbow is in the west. When the sun has moved to the western part of the sky, the rainbow appears to be in the east. The observer always stands between the sun and the rainbow. In other words, an observer can see a rainbow only when his back is to the sun.
What, from an optical point of view, is a rainbow? It is the effect
of clear, invisible sunlight being refracted by millions of tiny
droplets of water, each of which has a prismatic effect of breaking
clear light into several bands of colored light. Colored light is only
a part of full-spectrum light. Colored light is light with a
particular frequency, whereas whole sunlight contains all the
frequencies of light at once. A rainbow, then, can be considered to be
something like broken, fractured light. Whole light is invisible, yet
it enables one to see everything that one sees. Fractured light is
visible but enables one to see only part of the visual field. Looking
at this poetically, a rainbow is an image of a display of partial and
broken lights. One can see that only when one has turned one's back on
the whole light, the light that enables one to see everything
clearly.
Holding someone or something in the light
When Quakers know of someone who is undergoing difficulty, they
often say “Friends, let us hold so-and-so in the light.”
Quakers also talk of holding a concern in the light. In fact, at a
Quaker meeting for worship for business, the entire proceedings are a
series of holding issues in the light until it becomes clear to
everyone what the right solution is. Quaker meetings for business are
not run by Robert's Rules of Order. No one makes a motion. No vote is
ever taken. Rather, an issue is discussed in the context of vigilant
and attentive silence--silence broken only when someone has a leading
to share a new dimension of the issue being discussed--and the
discussion continues either until it is clear to everyone what the
right policy is or until it is clear that at this time no clarity can
be reached. (When the latter happens, the problem is set aside to be
“seasoned” for a month or so.)
The Quaker way of discussing problems or handing conflicts can be
see as doing just the opposite of what a prism does. A prism breaks up
whole light into a spectrum of colors. In A Quaker meeting, each
person comes in with a particular perspective, which is usually based
on a partial understanding. Each Friend comes to the meeting seeing a
problem in a colored light. As discussion takes place, all these
colors of light merge into a more complete light. No Friend can see
the full, clear light unless she is willing to turn her back to the
rainbow of partial lights.
Quaker business meetings often feel as though something miraculous
has emerged. Unity often arises out of what seems at first to be a set
of irreconcilable diversities. Every month, after the monthly meeting
for business at the Meetinghouse, I find myself wishing that America
(indeed, the entire world) could do business in a similar way. I wish
we could all have the courage and the will to abandon our partial
perspectives and to look at every problem of life in the whole clear
light, and I wish we could all realize that this can happen only when
we all have the courage and will to listen carefully to everything
being said, to hold it without reaction and judgment, and to let it
have its way with us. This does not mean concluding that
everyone is right about everything; it is not a descent into
irresponsible relativism. Rather it is ascent into a higher
understanding, one that is based on the recognition that everyone has
a truth to tell and is therefore worth hearing out, but everyone's
truth is partial and in need of being complemented by other
perspectives.
Perhaps one of the reasons that few Quakers experience a conflict
between religion and science is that the deep listening and reflection
that is the soul of the Quakerly way of dealing with concerns is a way
that is both the way of mystical religion and the way of scientific
method. As long as one is willing to listen further and to reconsider
issues in a fuller light than has been available so far, then one is
prepared to do both good religion and good science.
At this stage of its development, a significant portion of the
American nation seems to have developed the habit of turning its back
on whole light and looking at all problems in isolation and in
fractured, refracted light. That is a way of seeing that promotes
fear, even panic, and results in ever-increasing destruction. There is
an alternative to that fearful way of seeing, but one of the effects
of fear is that one can rarely see alternatives to being fearful.
America is now in dire need of enlightenment. Whether enough people
will see the light to turn the country back onto a more wholesome
course remains to be seen. As the country descends into deeper
darkness, there will always be some of us holding the country in the
light.