"The advance of knowledge is an infinite progression towards a goal that ever recedes."

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Nothing is more human than for man to desire naturally things impossible to his nature. It is, indeed, the property of a nature which is not closed up in matter like the nature of physical things, but which is intellectual or infinitized by the spirit. It is the property of a metaphysical nature. Such desires reach for the infinite, because the intellect thirsts for being and being is infinite.

— Jacques Maritain