Education is but a preparation of the physical, intellectual, and spiritual powers for the best performance of all the duties of life. The powers of endurance, and the strength and activity of the brain, are lessened or increased by the way in which they are employed. The mind should be so disciplined that all its powers will be symmetrically developed. CCh 168.1
Many youth are eager for books. They desire to read everything that they can obtain. Let them take heed what they read as well as what they hear. I have been instructed that they are in the greatest danger of being corrupted by improper reading. Satan has a thousand ways of unsettling the minds of youth. They cannot safely be off guard for a moment. They must set a watch upon their minds, that they may not be allured by the enemy's temptations.238Messages to Young People, 271 CCh 168.2