LI. I know very well, that to enforce the importance and propriety of this paradox, the authority of these, and other such examples that might be instanced, is weak, compared to the infinite number of opposite ones that might be produced against it. Therefore, it will be absolutely necessary for us to have recourse to reason, to supply this defect of authority. LII. It appears to me, that two advantages of great importance would be derived to the public by trades being hereditary; the first of which is, that it would contribute greatly to the perfectioning of arts. When there is no other relation or connexion between the master and his pupil, than the latter being the apprentice of the first, the master is seldom very anxious about instructing his scholar; and what is more, he is not well disposed to communicate to him any particular secrets of his art, which he has acquired by virtue of his own penetration and experience; and generally, contents himself with instructing him in what is commonly known and practised. But there is no reserve of this sort, when the instruction is conveyed from the father to his son, for paternal love cannot assent to it; and hence it is, that where the skill of the master is equal, he will be better taught who learns of his father, than he who is instructed by a stranger. LIII. By this total translation of skill from father to son, and by the same trade being continued in, and handed down to their posterity, there would without doubt result this benefit, that the art of it would be improved, and that it would continue advancing every age, nearer and nearer to perfection. It is very common, for one artist to make some improvements on what he has learned from another; and it is very common also, for him who has made them, to let them die and be buried with him; on account of its being against his interest, to communicate them to other people. This impediment to making his improvements known, seldom subsists between father and son; because the father, most commonly considers the interest of his son as his own; and consequently, communicates to his son all he knows. If the son from his own ingenuity, makes improvements on what he has been taught by his father, and hands them down to the grandson; and they all continue to do the same by their successors; the arts by this means, would proceed to approach nearer to perfection every generation.