He started to feel that the world of Copernicus...
He started to feel that the world of Copernicus, who proved that the earth is but a planet of the sun, differs a great deal from the conventional world which Ptolemy spoke of, and that nature, which started revealing its secrets to Galileo and his peers among the scientists, is a new thing compared to the portrait inherited down from the saints and former thinkers like Saint Thomas Acquinas, Dante and others.
Thus does he suddenly, and with a trembling hand, throw his former precepts, trying to be relieved of the frame in which he lived thousands of years. In its escalating revolutionary torrent, doubt did not stop there. Rather, it wiped out all values and precepts common to humanity and on which it depended to check behaviour and regulate relationships.
So long as the new cosmos contradicts the old concepts of the world, and as long as man keeps looking at his reality and environment from a scientific angle, rather than from mythology, then there has to be a reassessment of the religious concept and likewise of all goals and principles man has lived before his new outlook of himself and his world crystallizes.
On this basis has the religion of Western man faced the dilemma of "modern" doubt, and it does not really hinge except on an emotional basis which soon started drying up because of the Church's tyranny and might. It was natural, then, that all of these ethical bases melted at the conclusion of this defeat. So were the principles and ideals which check man's behaviour and tolerate his extremism, for ethics have always been linked to religion throughout humanity's existence.
When they lose their religious source which provides them with true values and links them to the world of the unknown and of the rewards, they become an empty ruin and an unjustifiable tax. History always highlights this fact. Greek advocates of sophistry disbelieved in deism because of their dependence on a "sophisticated" doubt, so they rejected the ethical restrictions, rebelling against them, and Western man repeated the story anew when "modern" doubt engulfed his religious creed.
He revolted against all sorts of disciplinary manners and ethical codes. Such manners and ethics seemed to him to be linked to an ancient phase of man's history.