"I am afraid that the schools will prove the very gates of hell, unless they diligently labor in explaining the Holy Scriptures and engraving them in the heart of the youth."

"Whoever does not accept my teaching may not be saved -- for it is God's teaching and not mine."

"Teaching is of more importance than urging."

"Count it one of the highest virtues upon earth to educate faithfully the children of others, which so few, and scarcely any, do by their own."