If a child is lazy and does his tasks badly, you should say to him one day, even if it is not true, "There this time your work is much better than it generally is. Well done". The child, flattered by the unaccustomed commendation, will certainly work better the next time, and, little by little, thanks to judicious encouragement, will succeed in becoming a real worker.
At all costs avoid speaking of illness before children, as it will certainly create in them bad autosuggestions. Teach them, on the contrary, that health is the normal state of man, and that sickness is an anomaly, a sort of backsliding which may be avoided by living in a temperate, regular way.
Do not create defects in them by teaching them to fear this or that, cold or heat, rain or wind, etc. Man is created to endure such variations without injury and should do so without grumbling.
Do not make the child nervous by filling his mind with stories of hob-goblins and were-wolves, for there is always the risk that timidity contracted in childhood will persist later.
It is necessary that those who do not bring up then children themselves should choose carefully those to whom they are entrusted. To love them is not sufficient, they must have the qualities you desire your children to possess.
Awaken in them the love of work and of study, making it easier by explaining things carefully and in a pleasant fashion, and by introducing in the explanation some anecdote which will make the child eager for the following lesson.
Above all impress on them that Work is essential for man, and that he who does not work in some fashion or another, is a worthless, useless creature, and that all work produces in the man who engages in it a healthy and profound satisfaction; whilst idleness, so longed for and desired by some, produces weariness, neurasthenia, disgust of life, and leads those who do not possess the means of satisfying the passions created by idleness, to debauchery and even to crime.
Teach children to be always polite and kind to all, and particularly to those whom the chance of birth has placed in a lower class than their own, and also to respect age, and never to mock at the physical or moral defects that age often produces.
Teach them to love all mankind, without distinction of caste. That one must always be ready to succor those who are in need of help, and that one must never be afraid of spending time and money for those who are in need; in short, that they must think more of others than of themselves.
In so doing an inner satisfaction is experienced that the egoist ever seeks and never finds.