When you submit to God’s authority you are being faithful - that should be your primary aim in life for when you are faithful God makes you a fruitful member of His kingdom. You focus on faithfulness and He will handle the fruitfulness. But, it all hinges on your submission to the authority of God. And that is Luke’s focus again today.
Belief in the bodily resurrection is a foundational pillar of our christian beliefs. Without that, there are consequences that affect our eternity with Christ.