“Our care of the child should be governed, not by the desire to make him learn things, but by the endeavor always to keep burning within him that light which is called intelligence.”

As quoted by Forrest C. Pogue, in "George C. Marshall: Global Commander" (1968)

Richard Ames; chapter 9, p. 108
The Cat Who Walks Through Walls (1985)

No Treason (1867–1870), No. VI: The Constitution of No Authority

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 97.

Deeds Rather Than Words (1963)
Context: I don't believe in playing down to children, either in life or in motion pictures. I didn't treat my own youngsters like fragile flowers, and I think no parent should.
Children are people, and they should have to reach to learn about things, to understand things, just as adults have to reach if they want to grow in mental stature. Life is composed of lights and shadows, and we would be untruthful, insincere, and saccharine if we tried to pretend there were no shadows. Most things are good, and they are the strongest things; but there are evil things too, and you are not doing a child a favor by trying to shield him from reality. The important thing is to teach a child that good can always triumph over evil, and that is what our pictures attempt to do.

The Rise and Progress of Religion in the Soul.

Source: Meditations (c. 121–180 AD), Book VIII, 54

By Still Waters (1906)

Source: De architectura (The Ten Books On Architecture) (~ 15BC), Book VIII, Chapter VI, Sec. 13
Context: To guard against this, we must proceed as follows. Let down a lighted lamp, and if it keeps burning, a man may make the descent without danger.