1 Corinthians 1:21 For since, in the wisdom of God, the world did not know God through wisdom, it pleased God through the folly of what we preach to save those who believe.

Is it really that simple?

John 20:25So the other disciples told him, “We have seen the Lord.” But he said to them, “Unless I see in his hands the mark of the nails, and place my finger into the mark of the nails, and place my hand into his side, I will never believe.”

Thomas refused to believe this friends.

Luke 24:32 They said to each other, “Did not our hearts burn within us while he talked to us on the road, while he opened to us the Scriptures?”

Two men on the road to Emmaus did not recognize Jesus as their Savior until He blessed the bread and gave it to them to eat.

What will it take to get the lost to believe and be saved?

God only knows.

And that is the point. Share the gospel and leave the believing up to God.