We linger in manhood to tell the dreams of our childhood, and they are half forgotten ere we have learned the language.
(Henry David Thoreau (1817-1862), U.S. philosopher, author, naturalist. A Week on the Concord and Merrimack Rivers (1849), in The Writings of Henry David Thoreau, vol. 1, p. 406, Houghton Mifflin (1906).)
The real dividing line between early childhood and middle childhood is not between the fifth year and the sixth yearit is more nearly when children are about seven or eight, moving on toward nine. Building the barrier at six has no psychological basis. It has come about only from the historic-economic-political fact that the age of six is when we provide schools for all.
(James L. Hymes, Jr. (20th century), U.S. child development specialist, author. Teaching the Child Under Six, ch. 2 (1968).)