Reading through Luke in my Bible time and I’m noticing a theme jumping out at me. 

Luke 13 
Fig tree that doesn’t produce fruit- give it a little more time to see if it produces. If not next year, then we’ll cut it down. 

Narrow door 
Make every effort to enter. Many will try but won’t be able. They will plead but the master will say, “I don’t know you”. 

Jesus’ sorrow over Jerusalem: How I longed to gather you, but you wouldn’t submit. 

Luke 14 
Great banquet parable where many were invited but the first invitees rejected the invitation. The Lord is angry and sends them out to invite others instead. 

Cost of being a disciple. 
You must reject anything that prevents you from coming to Christ. Any person who doesn’t pick up the cross and follow Jesus can’t be his disciple. Those of you who do not give up everything you have cannot be my disciples.  

The fig tree, sorrow over Jerusalem, and banquet, are immediately about the Jew’s rejection of Jesus. But in each of these, the basic story is one of God reaching towards someone who refuses to acknowledge him and submit. The narrow door and cost of being a disciple are directed towards individuals rather than a population, but the basic idea- rejecting the truth, is the same.