Do we need more of the Holy Spirit?

Do we need a second portion of the Holy Spirit after salvation? Does Paul say we might lose our salvation because of coarse jesting? My son thinks we might be saved by works. What can I share with him? Do we celebrate communion in order to be forgiven by God?

Keep the Christian life simple!

Which commandments do we need to follow in the Bible? Can you explain Ephesians 5 concerning coarse jesting and immorality? What is the “simplicity of Christ” that Paul talks about? How can we avoid straying from it?