# Now
This word marks a switch in Jesus's teaching. He was telling about Moses. Now he explains why what Moses said was important.
# he is not the God of the dead, but of the living
"the Lord is not the God of dead people; he is the God of living people". Since these living people died physically, they must still be alive spiritually.
# because all live to him
"because in God's sight they all are still alive" or "because they live in God's presence"