64. It is universally allowed that matter, in all its operations, is actuated by a necessary force, and that every natural effect is so precisely determined by the energy of its cause that no other effect, in such particular circumstances, could possibly have resulted from it.
64. Unibertsalki onartua da materia, bere eragiketa guztietan, indar beharrezko batek ariarazten duela eta berezko efektu oro bere kausaren indarrak hain zehazki determinaturik dagoela, ezen zirkunstantzia konkret hauetan ez baitaiteke beste inolako efekturik hartatik sor.