There is, I feel, an age at which the individual man would want to stop: you wi l seek the age at which you would desire your Species had stopped. Di… - Jean-Jacques Rousseau

There is, I feel, an age at which an individual man would want to stop. You will seek the age at which you would want your species to have stopped. Dissatisfied with your present state for reasons that portend even greater grounds for dissatisfaction for your unhappy posterity, perhaps you would like to be able to go backwards in time.

"Bien sea de hombre a hombre, bien sea de hombre a pueblo, siempre será igualmente descabellado este discurso: "Celebro contigo un contrato en el cual todos los deberes están a tu cargo y todos los beneficios están a mi favor; contrato, que respetaré mientras se me dé la gana y que tú observarás mientras se me dé la gana"."

In any case, there can be no doubt that Adam was sovereign of the world, as Robinson Crusoe was of his island, as long as he was its only inhabitant; and this empire had the advantage that the monarch, safe on his throne, had no rebellions, wars, or conspirators to fear.

Ses progrès dans la géométrie vous pourraient servir d'épreuve et de mesure certaine pour le développement de son intelligence : mais sitôt qu'il peut discerner ce qui est utile et ce qui ne l'est pas, il importe d'user de beaucoup de ménagement et d'art pour l'amener aux études spéculatives.