A child who passes through many hands in turn, can never be well brought up. At every change he makes a secret comparison, which continually tends to… - Jean-Jacques Rousseau

It is reason which breeds pride and reflection which fortifies it; reason which turns man inward into himself; reason which separates him from everything which troubles or affects him. It is philosophy which isolates a man, and prompts him to say in secret at the sight of another suffering: 'Perish if you will; I am safe.' No longer can anything but dangers to society in general disturb the tranquil sleep of the philosopher or drag him from his bed. A fellow-man may with impunity be murdered under his window, for the philosopher has only to put his hands over his ears and argue a little with himself to prevent nature, which rebels inside him, from making him identify himself with the victim of the murder. The savage man entirely lacks this admirable talent, and for want of wisdom and reason he always responds recklessly to the first promptings of human feeling.

"Plato, in his Republic, which is considered so stern, teaches the children only through festivals, games, songs, and amusements. It seems as if he had accomplished his purpose when he had taught them to be happy; and Seneca, speaking of the Roman lads in olden days, says, "They were always on their feet, they were never taught anything which kept them sitting." Were they any the worse for it in manhood? Do not be afraid, therefore, of this so-called idleness. What would you think of a man who refused to sleep lest he should waste part of his life? You would say, "He is mad; he is not enjoying his life, he is robbing himself of part of it; to avoid sleep he is hastening his death." Remember that these two cases are alike, and that childhood is the sleep of reason."

La jeunesse est le temps d'étudier la sagesse; la vieillesse est le temps de la pratiquer.