Wow! Let’s do the easy bits first…
In 13:33-37 we’re reminded that righteousness begins in the heart and is shown by words and actions!
In 13:38-42 we see that people are looking for a sign/reason to believe. We are given a sign – the resurrection (1 Corinthians 15:1-5)!
In 13:46-50 we’re reminded that when we believe we become a part of a new family, and we show that we’re a part of the family by following God and His Word!
Let’s take 13:43-45 next. Jesus makes it specific to that generation. They are experiencing the grace of God through Jesus and His ministry (the unclean spirit is gone!). If they end up rejecting Him as a nation, then what happens next will be truly horrible. We see that with the destruction of Jerusalem and the temple in 70 A.D.
I believes this plays into 13:22-32. Jesus is continually challenging the religious leadership and the lack of belief in that generation. In the context of Jesus defending His ministry and pointing out the Pharisees illogical assumptions, Jesus makes a statement about the Spirit: “For this reason I tell you, people will be forgiven for every sin and blasphemy, but the blasphemy against the Spirit will not be forgiven. Whoever speaks a word against the Son of Man will be forgiven. But whoever speaks against the Holy Spirit will not be forgiven, either in this age or in the age to come.” Jesus makes these comments right after sharing that He is able to cast out demons by the Spirit of God and not by the power of Satan. I have come to believe that the best way to understand this verse is to see it as specific to that time and context. In other words it could happen precisely because Jesus Christ was physically ministering on the earth at the time, in the power of the Spirit, and the Pharisees were saying that He was casting out demons by the power of Satan. If we are worried about an unpardonable sin in our generation, it is simply an unwillingness to believe in Jesus Christ.
John 3:36 “The one who believes in the Son has eternal life. The one who rejects the Son will not see life, but God’s wrath remains on him.“