Thetis, so the story goes, plunged her son in the waters of Styx to make him invulnerable. The truth of this allegory is apparent. The cruel mothers I speak of do otherwise; they plunge their children into softness, and they are preparing suffering for them, they open the way to every kind of ill, which their children will not fail to experience after they grow up. Fix your eyes on nature, follow the path traced by her. She keeps children at work, she hardens them by all kinds of difficulties, she soon teaches them the meaning of pain and grief. They cut their teeth and are feverish, sharp colics bring on convulsions, they are choked by fits of coughing and tormented by worms, evil humours corrupt the blood, germs of various kinds ferment in it, causing dangerous eruptions. Sickness and danger play the chief part in infancy. One half of the children who are born die before their eighth year. The child who has overcome hardships has gained strength, and as soon as he can use his life he holds it more securely. This is nature's law; why contradict it? Do you not see that in your efforts to improve upon her handiwork you are destroying it; her cares are wasted? To do from without what she does within is according to you to increase the danger twofold. On the contrary, it is the way to avert it; experience shows that children delicately nurtured are more likely to die. Provided we do not overdo it, there is less risk in using their strength than in sparing it. Accustom them therefore to the hardships they will have to face; train them to endure extremes of temperature, climate, and condition, hunger, thirst, and weariness. Dip them in the waters of Styx. Before bodily habits become fixed you may teach what habits you will without any risk, but once habits are established any change is fraught with peril. A child will bear changes which a man cannot bear, the muscles of the one are soft and flexible, they take whatever direction you give them without any effort; the muscles of the grown man are harder and they only change their accustomed mode of action when subjected to violence. So we can make a child strong without risking his life or health, and even if there were some risk, it should not be taken into consideration. Since human life is full of dangers, can we do better than face them at a time when they can do the least harm? A child's worth increases with his years. To his personal value must be added the cost of the care bestowed upon him. For himself there is not only loss of life, but the consciousness of death. We must therefore think most of his future in our efforts for his preservation. He must be protected against the ills of youth before he reaches them: for if the value of life increases until the child reaches an age when he can be useful, what madness to spare some suffering in infancy only to multiply his pain when he reaches the age of reason. Is that what our master teaches us?