Luke 18:8
"I tell you that he will avenge them speedily. Nevertheless when the Son of man cometh, shall he find faith on the earth?"
As Jesus told the parable of the widow and the unjust judge, He wondered aloud if when He came back to take us to Heaven if He would find faith on the Earth. He tells the story of a widow who approached a judge who had no fear of God and didn't care what man thought. This widow lady went to the judge to ask him to avenge her of her adversary. This judge wanted nothing to do with her, yet because she kept on wearying him with her request, he finally gave in and granted her request. In this parable Jesus shows us what it will take for Him to find faith.