The principle of sufficient reason is not, as all scholastic philosophy maintains, a veritas aeterna-that is to say, it does not possess an unconditioned validity before, outside of, and above the world. It is relative and conditioned, and valid only in the sphere of phenomena, and thus it may appear as the necessary nexus of space and time, or as the law of causality, or as the law of the ground of knowledge.
eta horregatik, munduaren barne-funtsa, berbaitango gauza, inoiz ezin da printzipio horren gidalerroan aurkitu;