Bruno would urge us to open our eyes

Bruno would urge us to open our eyes

A statue honoring Giordano Bruno in the present day Campo de' Fiori • Photo by Fred Romero (CC BY 2.0)

Originally published 22 February 2000

Gior­dano Bruno was born in the King­dom of Naples in 1548, only a few years after the death of Coper­ni­cus. At the age of 24 he was ordained a Domini­can priest, although his curi­ous and unin­hib­it­ed mind had already attract­ed the dis­ap­proval of his teach­ers. With­in a few years of ordi­na­tion, he was accused of heresy — a first that would lat­er occur many times. The very idea of heresy meant noth­ing to Bruno; he claimed for him­self (and for oth­ers) the lib­ertes philo­soph­i­ca, the right to phi­los­o­phize, to dream, unfet­tered by author­i­ty or tradition.

Poet, philoso­pher, loose can­non: Bruno wan­dered across Europe all his life — Italy, Gene­va, France, Eng­land, Ger­many — stir­ring up a fuss wher­ev­er he went, offend­ing Catholics and Protes­tants alike, shak­ing up pre­con­cep­tions, rat­tling com­pla­cen­cies, ask­ing philoso­phers and shop­keep­ers to enter­tain a doubt or two: The uni­verse and God might be big­ger than we think.

He was a mod­ern in many qual­i­ties of mind — mate­ri­al­ist, ratio­nal­ist, a cham­pi­on of free and skep­ti­cal inquiry. The uni­verse is a uni­ty, he believed. He made no dis­tinc­tion between mat­ter and spir­it, body and soul, yet he was ener­gized and exhil­a­rat­ed by the majesty of the uni­verse as it was being revealed to the Renais­sance suc­ces­sors of Coper­ni­cus. Among his more auda­cious dreams was of an infini­tude of inhab­it­ed worlds — an idea that trou­bled the sleep of many a theologian.

The prob­lem, with­in Chris­t­ian the­ol­o­gy, had to do with the sup­posed unique­ness of Adam’s fall into sin, and of the redemp­tion of Christ. If there are oth­er sen­tient beings in the uni­verse, did they share in Adam’s sin, and did they require sep­a­rate acts of atone­ment on the part of the Redeemer? It may seem strange to many of us, but these ques­tions exer­cised the­olo­gians from Ori­gen in the third cen­tu­ry to Karl Rah­n­er in the 20th.

In an arti­cle last year in the jour­nal, The­o­log­i­cal Stud­ies, the Domini­can the­olo­gian Thomas O’Meara sur­veys the long debate about the the­o­log­i­cal impli­ca­tions of mul­ti­ple inhab­it­ed worlds, and comes to the con­clu­sion that in these mat­ters the Chris­t­ian the­olo­gian should take a cos­mic view and be guid­ed by the dis­cov­er­ies of empir­i­cal sci­ence. An echo, it would seem, of Bruno.

In 1591, at the request of a poten­tial patron, Bruno returned to Italy, to the Repub­lic of Venice, per­haps because he was home­sick, per­haps because he sought the Chair of Math­e­mat­ics at the Uni­ver­si­ty of Pad­ua, which he knew to be open. Big mis­take. He was soon denounced by his erst­while patron to the Inqui­si­tion. Extra­dit­ed to Rome, he lan­guished in a prison of the Holy Office for sev­en years, strug­gling to accom­mo­date his tor­menters with­out for­sak­ing his principles.

Accom­mo­da­tion proved impos­si­ble. In Feb­ru­ary of 1600, he was tak­en gagged to the Cam­po de’ Fiori, or “Field of Flow­ers,” and put to the stake. Years ago, dur­ing a vis­it to Rome, I made my way to the Cam­po de’ Fiori, now a busy mar­ket square in the cen­ter of the city, to see the place where Bruno was burned. A melan­choly and some­what sin­is­ter stat­ue of the philoso­pher stands on a pedestal in the square, erect­ed by sec­u­lar human­ists in the 19th cen­tu­ry when the uni­fi­ca­tion of Italy lib­er­at­ed Rome from direct papal rule.

Bruno was not a sci­en­tist in the mold of Coper­ni­cus or Kepler. He was a dream­er who let the sci­en­tif­ic search for truth inform his dreams. His vision of an infini­tude of inhab­it­ed worlds was not based on any sol­id evi­dence, only on an intu­ition of what seemed in keep­ing with a Coper­ni­can cos­mol­o­gy. With­in a decade of his exe­cu­tion, how­ev­er, his dream took substance.

The vacant Chair of Math­e­mat­ics at the Uni­ver­si­ty of Pad­ua was offered to Galileo Galilee of Flo­rence. In the win­ter of 1610, Galileo turned the world’s first astro­nom­i­cal tele­scope to the night sky and saw such things as would change the world for­ev­er — moun­tains on the Moon, the moons of Jupiter, the phas­es of Venus, spots on the Sun, and myr­i­ad tiny stars that twin­kled beyond the lim­its of the human eye. He com­mu­ni­cat­ed these dis­cov­er­ies to the world in a book called The Star­ry Mes­sen­ger, in which he claimed that the uni­verse might be infi­nite and con­tain an infini­tude of stars. Pru­dent­ly, Galileo did not men­tion Bruno, although sure­ly he knew of the rad­i­cal philoso­pher and his unfor­tu­nate fate.

Today, we know that the uni­verse might indeed be infi­nite, and cer­tain­ly con­tains an uncount­able num­ber of suns; the Hub­ble Space Tele­scope looks out into a cos­mos con­tain­ing tens of bil­lions of vis­i­ble galax­ies. With manned and unmanned craft, we have vis­it­ed oth­er worlds in our solar sys­tem, and we have dis­cov­ered plan­ets around oth­er stars. Day and night we lis­ten with radio tele­scopes for intel­li­gi­ble sig­nals from oth­er worlds, the dis­cov­ery of which will be the only way we will ever know for sure whether or not we are alone.

What would Bruno have made of these mod­ern dis­cov­er­ies? Cer­tain­ly he would have applaud­ed the quest­ing spir­it and inde­pen­dence of mind that guides astronomers and space engi­neers into the heav­ens, nev­er know­ing what to expect, open to any pos­si­bil­i­ty. To do phi­los­o­phy, one must first put every­thing to doubt, urged Bruno, and the mod­ern sci­en­tist agrees. Above all else, we have learned that the only reli­able guide to what is, is to open our eyes and see.

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