Alan Lightman, a theoretical physicist and writer, begins "Searching for Stars on an Island in Maine" with a brief chapter on seeing 17,000-year-old cave paintings, and follows with his mystical experience while contemplating the stars on Maine's Lute Island.
Those two themes twine and twine again throughout this brief, wonderfully written book that ponders some of philosophy's most basic questions -- without, of course, being able to come to any definitive conclusions.
The experience in the cave takes Lightman back to the human artists who are completely unknown to us, just as we will be completely unknown to people 17,000 years in the future. We may find some meaning in those cave paintings today, but what meaning the artists intended, and any hint about their thoughts, feelings, identity and aspirations, are lost in the deep fog of time. Similarly, of course, our lives will disappear under the weight of millennia, and what matters so much to us now will be irrelevant in the blink of a geologic eye.
That being so, what is it that gives meaning to our lives? Why should we strive if all is eventually, and perhaps almost immediately, meaningless?
That brings Lightman to his other main point -- the search for the Absolute (his capitalization) and certainty, some of which can be found in mystical experiences. These deeply moving and powerful trance-like states lie at the heart of every religion and belief about the connectedness of the universe, and apparently (as I have never had one) bring meaning to the otherwise soulless collection of atoms and inexplicable fields of energy that are the foundation of the stars and galaxies.
Some who have had these experiences would like to impose the certainty and the Absolute they have touched in those moments on the rest of the world-- St. Augustine is Lightman's example -- but given that this universe is as mortal as you or I, Augustine's belief in eternal truth, or anyone's, must certainly be misplaced. (Lightman's scientific background does not allow him to evade hard questions about hypotheses of this or any sort.)
Like the best books that interweave the personal and metaphysical, "Searching for Stars on an Island in Maine," however, isn't about answers but rather about facing the questions and finding a way forward. Though nothing could be further from the style and heft of Lightman's book than Jean Paul Sartre's "Being and Nothingness," the two share a similar cold-blooded individualism that demands that each of us think through these questions on our own rather than relying on others to comfort us with their certainty and their Absolutes.
In the end, Lightman shifts gears and offers a Zen-like conclusion to the book that, like most metaphysical philosophy, creates more questions than it answers. Then again, as Lightman clearly believes (as do I), it is the thinking about the questions that really matters the most.