What does Deuteronomy 4:10 mean?

Remember the day you stood before the Lord your God at Horeb, when he told me, 'Gather the people so I can let them hear my words. That way, they'll learn to respect me as long as they live, and they'll teach their children too.' Deuteronomy 4:10 - Modern Text Bible

(He's reminding them of the time at Mount Sinai (Horeb), when God spoke directly to the people to teach them reverence.)