It is in fact always this necessity, known through perception in accordance with the principle of sufficient reason of being, which gives to geometry its principal evidence, and upon which in the consciousness of every one, the certainty of its propositions rests.
Izatez, izatearen arrazoiaren printzipioaren arabera, begiespenez ezaguturiko beharrezkotasun hori da beti geometriari bere ebidentzia handia ematen diona, eta zeinean bakoitzaren kontzientzian oinarritzen baita bere proposizioen ziurtasuna: