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 sacred books; as to show the uncertainty of the most probable things, it is only necessary to show that they are not included therein; since its principles are superior to nature and reason, and since, the mind of man being too weak to attain them by its own efforts, he cannot reach these lofty conceptions if he be not carried thither by an omnipotent and superhuman power.

It is thus that geometry, arithmetic, music, physics, medicine, architecture, and all the sciences that are subject to experiment and reasoning, should be augmented in order to become perfect. The ancients found them merely outlined by those who preceded them; and we shall leave them to those who will come after us in a more finished state than we received them.

As their perfection depends on time and pains, it is evident that although our pains and time may have acquired less than their labors separate from ours, both joined together must nevertheless have more effect than each one alone.

The clearing up of this difference should make us pity the blindness of those who bring authority alone as proof in physical matters, instead of reasoning or experiments; and inspire us with horror for the wickedness of others who make use of reasoning alone in theology, instead of the authority of the Scripture and the Fathers. We must raise the courage of those timid people who dare invent nothing in physics, and confound the insolence of those rash persons who produce novelties in theology. Nevertheless the misfortune of the age is such, that we see many new opinions in theology, unknown to all antiquity, maintained with obstinacy and received with applause; whilst those that are produced in physics, though small in number, should, it seems,