The lost sheep

Jesus said to his disciples: "Tell me. Suppose a man has a hundred sheep and one of them strays; will he not leave the ninety-nine on the hillside and go in search of the stray? I tell you solemnly, if he finds it, it gives him more joy than do the ninety-nine that did not stray at all. Similarly, it is never the will of your Father in heaven that one of these little ones should be lost."
(Mt 18:12-14)