“But in the work of the children I was already inclined to care less for the immediate gain than for the physical training which, by developing their strength and skill, was bound to supply them later with a means of livelihood. In the same way I considered that what is generally called the instruction of children should be merely an exercise of the faculties, and I felt it important to exercise the attention, observation, and memory first, so as to strengthen these faculties before calling into play the art of judging and reasoning; this, in my opinion, was the best way to avoid turning out that sort of superficial and presumptuous talker, whose false judgments are often more fatal to the happiness and progress of humanity than the ignorance of simple people of good sense. “Guided by these principles, I sought less at first to teach my children to spell, read, and write than to make use of these exercises for the purpose of giving their minds as full and as varied a development as possible.... “In natural history they were very quick in corroborating what I taught them by their own personal observations on plants and animals. I am quite sure that, by continuing in this way, I should soon have been able not only to give them such a general acquaintance with the subject as would have been useful in any vocation, but also to put them in a position to carry on their education themselves by means of their daily observations and experiences; and I should have been able to do all this without going outside the very restricted sphere to which they were confined by the actual circumstances of their lives. I hold it to be extremely important that men should be encouraged to learn by themselves and allowed to develop freely. It is in this way alone that the diversity of individual talent is produced and made evident. “I always made the children learn perfectly even the least important things, and I never allowed them to lose ground; a word once learnt, for instance, was never to be forgotten, and a letter once well written never to be written badly again. I was very patient with all who were weak or slow, but very severe with those who did anything less well than they had done it before.