"But how can people call for help if they don't know who to trust? And how can they know who to trust if they haven't heard of the One who can be trusted? And how can they hear if nobody tells them? And how is anyone going to tell them, unless someone is sent to do it?" Romans 10:14-15 The Message
I find it hard to believe there are still people in the world who know nothing about God and His Son, Jesus, but this is a reality. You don't even have to go to a foreign country to find someone who doesn't know the story of Christ. But, these people don't know they're lost and without a Savior. My pastor/husband often says that we have to get a person lost before they realize their need for salvation. I think that's the gist of the first line in the scripture above. They may realize they feel an emptiness but not understand the void can only be filled by Jesus.
This leads us to the second question. Those who haven't heard about the Savior need to know of His sacrifice for them. They need to know they can trust in a God who loved them so much that He gave His only Son.
But, the lost can't know about Jesus unless those of us who call ourselves saved tell them about the Lord. Someone must share with them the story of redemption through Jesus Christ, or they will never know.
If the lost need someone to tell them about Jesus, we must go to where they are. We can't sit in our "holy huddles" and expect the lost to come to us. Jesus didn't say come and see - He said go and tell. This doesn't mean we have to go to a foreign country or even to another place in our own country. Going and telling might simply mean a walk across the street or maybe even a discussion with someone in our own household. It might mean writing a letter or penning a story.
Whoever it is you should tell - go and tell. Whatever means God has given you to tell them - do it to the best of your ability and with His help.