We should treat our minds, that is, ourselves, as innocent and ingenuous children, whose guardians we are, and be careful what objects and what subjects we thrust on their attention.
Henry David Thoreau
Henry David Thoreau (1817–1862), U.S. philosopher, author, naturalist. “Life Without Principle” (1863), in The Writings of Henry David Thoreau, vol. 4, p. 475, Houghton Mifflin (1906).