Thematic Bible: The lost sheep

So He told them the following story: "What man among you, if he has a hundred sheep, and if he loses one of them, does not leave the ninety-nine in the desert and continue to look for the lost one until he finds it? And when he finds it, with joy he puts it on his shoulders, read more.
and when he reaches home he calls in his friends and neighbors, and says to them, 'Rejoice with me, because I have found my lost sheep!' Just so, I tell you, there will be more joy in heaven over one sinful person who repents than over ninety-nine upright people who do not need any repentance.

"What do you think? If a man has a hundred sheep and one of them gets lost, will he not leave the ninety-nine on the hillsides, and go and search for the one that is lost? And if he finds it, I solemnly say to you, he rejoices over it more than he does over the ninety-nine that did not get lost. Just so it is not the will of my Father in heaven that a single one of these little ones be lost.