Answer: See explanation
Step-by-step explanation:
The parable of a lost sheep can be found in the book of Luke from Chapter 15 verse 3-7.
The parable of the list sheep was told by Jesus to show that God's Kingdom is accessible to those that have gone astray, to sinners and everyone as a whole.
According to Jesus, heaven rejoices when a sinner repents and turns a new leaf. There is happiness when a shepherd finds his lost sheep that has gone astray and he rejoices over it even more than the other 99 sheep that didn't go astray.
The idea is that when a sheep is lost, the shepherd will go after it and also when the sheep is found, heaven rejoices.