Paul is clear that he didn't just share the good news message and move on, He actually loved the Thessalonians enough to share his very life with them. After reading this verse again, I was reminded that the gospel which means “good news” is not cheap news. It cost Jesus his life and I believe in most cases, when we share it with others it should coincide with sharing our lives with them as well.

Brothers and sisters don't give up praying for your unbelieving friends and family. There are no traits that disqualify someone from grace. God’s sovereign grace can step in at any point in a person's life and draw them to himself! It’s not our job to estimate the probabilities of where grace should succeed. We serve a sovereign God who knows all things and there will never be a day where he is uncertain of the ones he has called to salvation.