Jesus told the parable of the lost sheep in order to illustrate that

The parable of the lost sheep is a story that Jesus told in the Bible in order to illustrate the concept that there is joy in heaven over a sinner who repents. In the parable, a shepherd has 100 sheep, but one goes missing. The shepherd leaves the 99 other sheep and goes in search of the lost one. When he finds it, he rejoices and calls together his friends and neighbors to celebrate. Jesus used this story to show that God cares about every person, and that when a lost person turns to God, there is great rejoicing in heaven. The parable also teaches us that God actively seeks out those who are lost and desires for them to be found.