"Down below all the crust of human conceptions, of human ideas, Christ sank an artesian well into a source of happiness so pure and blessed that even yet the world does not believe in it."

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I presume that few who have paid any attention to the history of the Mathematical Analysis, will doubt that it has been developed in a certain order, or that that order has been, to a great extent, necessary -- being determined, either by steps of logical deduction, or by the successive introduction of new ideas and conceptions, when the time for their evolution had arrived.

— George Boole