"And so, today, if the state can no longer appeal to the old moral principles that belong to the Christian tradition, it will be forced to create a new official faith and new moral principles which will be binding on its citizens."

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Our model of Nature should not be like a building-a handsome structure for the populace to admire, until in the course of time some one takes away a corner stone and the edifice comes toppling down. It should be like an engine with movable parts. We need not fix the position of any one lever; that is to be adjusted from time to time as the latest observations indicate. The aim of the theorist is to know the train of wheels which the lever sets in motion-that binding of the parts which is the soul of the engine.

— Arthur Eddington