" What’s the problem throughout Christendom today in connection with Sunday school? It is that so many drop through the Sunday school net when they grow up to the age of sixteen or so, and that’s the last we see of them. Many young men who were once Sunday school students are now in our prisons. The cause of that is that so few teachers believe the children can be converted when they are young. They don’t work to bring them to a knowledge of Christ, but are content only to go on sowing the seed. Let a teacher resolve that with God’s help, he won’t rest until he sees his whole class brought into the kingdom of God. If he determines to do this, he will see signs and wonders inside of thirty days. "

― Dwight L. Moody , A Life for Christ: What the Normal Christian Life Should Look Like