But provided that it is understood that necessity and possibility, taken metaphysically and strictly, depend solely upon this question, whether the object in itself or that which is opposed to it implies contradiction or not; and that one takes into account that contingency is consistent with the inclinations, or reasons which contribute towards causing determination by the will; provided also that one knows how to distinguish clearly between necessity and determination or certainty, between metaphysical necessity, which admits of no choice, presenting only one single object as possible, and moral necessity, which constrains the wisest to choose the best; finally, provided that one is rid of the chimera of complete indifference, which can only be found in the books of philosophers, and on paper (for they cannot even conceive the notion in their heads, or prove its reality by an example in things) one will easily escape from a labyrinth whose unhappy Daedalus was the human mind.