The question from the disciples this week is not meant to be one to challenge or trip Jesus up. Rather, it is common in Jewish tradition to ask if there is a way to summarize commandments. Jesus, in turn, gives a rather traditional answer, siting Deuteronomy 6:4-5 (Hear, O Israel: The Lord is our God, the Lord alone. You shall love the Lord your God with all your heart, and with all your soul, and with all your might) and Leviticus 19:18 (You shall not take vengeance or bear a grudge against any of your people, but you shall love your neighbor as yourself: I am the Lord). Jesus uses these two passages as a foundation for becoming a whole person of God. For Jesus, these are the core texts of faith and belief.
Note: This is the lesson plan for Proper 26. Check with your clergy person about what propers you are using for this Sunday since it is also customary to celebrate All Saints Sunday today.