If the people of Europe had known as much of astronomy and geology when the bible was introduced among them, as they do now, there never could have been one believer in the doctrine of inspiration. If the writers of the various parts of the bible had known as much about the sciences as is now known by every intelligent man, the book never could have been written. It was produced by ignorance, and has been believed and defended by its author. It has lost power in the proportion that man has gained knowledge. A few years ago, this book was appealed to in the settlement of all scientific questions; but now, even the clergy confess that in such matters, it has ceased to speak with the voice of authority. For the establishment of facts, the word of man is now considered far better than the word of God. In the world of science, Jehovah was superseded by Copernicus, Galileo, and Kepler. All that God told Moses, admitting the entire account to be true, is dust and ashes compared to the discoveries of Descartes, Laplace, and Humboldt. In matters of fact, the bible has ceased to be regarded as a standard. Science has succeeded in breaking the chains of theology. A few years ago, Science endeavored to show that it was not inconsistent with the bible. The tables have been turned, and now, Religion is endeavoring to prove that the bible is not inconsistent with Science. The standard has been changed.

At present, a good many men engaged in scientific pursuits, and who have signally failed in gaining recognition among their fellows, are endeavoring to make reputations among the churches by delivering weak and vapid lectures upon the 'harmony of Genesis and Geology.' Like all hypocrites, these men overstate the case to such a degree, and so turn and pervert facts and words that they succeed only in gaining the applause of other hypocrites like themselves. Among the great scientists they are regarded as generals regard sutlers who trade with both armies.Surely the time must come when the wealth of the world will not be wasted in the propagation of ignorant creeds and miraculous mistakes. The time must come when churches and cathedrals will be dedicated to the use of man; when minister and priest will deem the discoveries of the living of more importance than the errors of the dead; when the truths of Nature will outrank the 'sacred' falsehoods of the past, and when a single fact will outweigh all the miracles of Holy Writ.Who can over estimate the progress of the world if all the money wasted in superstition could be used to enlighten, elevate and civilize mankind?When every church becomes a school, every cathedral a university, every clergyman a teacher, and all their hearers brave and honest thinkers, then, and not until then, will the dream of poet, patriot, philanthropist and philosopher, become a real and blessed truth.

Push up some mountains. Cut them down. Drown the land under the sea. Push up some more mountains. Cut them down. Push up a third set of mountains, and let the river cut through them. “Unconformity” is the geologic term for an old, eroded land surface buried under younger rock layers. Put your outspread hand over the Carlin Canyon, Nevada unconformity and your fingers span roughly forty million years- the time that it took to bevel down the first set of mountains and deposit the younger layers on top. What is forty million years? Enough time for a small predatory dinosaur to evolve into a bird. Enough time for a four-legged, deer-like mammal to evolve into a whale. And far more than enough time to turn an ape-like creature in eastern Africa into a big-brained biped who can marvel at such things. The Grand Canyon’s Great Unconformity divides 1.7 billion-year-old rock from 550 million-year-old rock, a gap of more than one billion years. One billion years. I earn my salary studying the Earth and teaching its history, but I admit utter helplessness in comprehending such a span. A billion pages like those of this book would stack up more than forty miles. I had lived one bullion seconds a few days before my thirty-second birthday. A tape measure one billion inches long would stretch two-thirds of the way around the Earth. Such analogies hint at what deep time means- but they don’t get us there. “The human mind may not have evolved enough to be able to comprehend deep time," John McPhee once observed, “it may only be able to measure it.