When to start philosophy

Montaigne wrote in his essay on the education of children, “The boy we would breed has a great deal less time to spare; he owes but the first fifteen or sixteen years of his life to education; the remainder is due to action. Let us, therefore, employ that short time in necessary instruction. Away with the thorny subtleties of dialectics, they are abuses, things by which our lives can never be amended: take the plain philosophical discourses, learn how rightly to choose, and then rightly to apply them; they are more easy to be understood than one of Bocaccio’s novels; a child from nurse is much more capable of them, than of learning to read or to write. Philosophy has discourses proper for childhood, as well as for the decrepit age of men.”