I beg these critics who are so ready with their blame to consider that I am as well acquainted as they are with everything they say, that I have probably given more thought to it, and that, as I have no private end to serve in getting them to agree with me, I have a right to demand that they should at least take time to find out where I am mistaken. Let them thoroughly examine the nature of man, let them follow the earliest growth of the heart in any given circumstances, so as to see what a difference education may make in the individual; then let them compare my method of education with the results I ascribe to it; and let them tell me where my reasoning is unsound, and I shall have no answer to give them. It is this that makes me speak so strongly, and as I think with good excuse: I have not pledged myself to any system, I depend as little as possible on arguments, and I trust to what I myself have observed. I do not base my ideas on what I have imagined, but on what I have seen. It is true that I have not confined my observations within the walls of any one town, nor to a single class of people; but having compared men of every class and every nation which I have been able to observe in the course of a life spent in this pursuit, I have discarded as artificial what belonged to one nation and not to another, to one rank and not to another; and I have regarded as proper to mankind what was common to all, at any age, in any station, and in any nation whatsoever. Now if in accordance with this method you follow from infancy the course of a youth who has not been shaped to any special mould, one who depends as little as possible on authority and the opinions of others, which will he most resemble, my pupil or yours? It seems to me that this is the question you must answer if you would know if I am mistaken. It is not easy for a man to begin to think; but when once he has begun he will never leave off. Once a thinker, always a thinker, and the understanding once practised in reflection will never rest. You may therefore think that I do too much or too little; that the human mind is not by nature so quick to unfold; and that after having given it opportunities it has not got, I keep it too long confined within a circle of ideas which it ought to have outgrown.