This parable is one of a trio in the Lost and Found chapter. The lost and found sheep, one of 100. The lost and found coin, one of 10. The lost and found son, one of two. But there is a refrain at the end of the first two parables. This third one describes this truth: “There is joy before the angels of God over one sinner who repents.”
Will we join the celebration? Will we return to God if we are far off? Will we come in if we’re standing aloof in bitterness and anger? Every gathering of God’s people is to be a foretaste of the joy to come, a celebration of God’s grace and joy in the fellowship of the redeemed. Don't be mad or sad. Be glad and rejoice in God's grace every day.