In the parable of the lost sheep in Luke 15:1-7, Jesus raised the question that a shepherd who own 100 sheep will leave the 99 sheep if one is missing. And when the shepherd found the missing sheep, he will be very happy. Similarly, there will be more rejoicing over one lost soul who repent and turn to Christ compared to 99 righteous persons.
Jesus used sheep to make comparison to a person who is lost because sheep has a high tendency to roam around and get lost. The sheep will not be be able to find its way back, like dog, if it wander away from the flock, and got missing. Jesus said he is the good shepherd who lays his life down for his sheep (John 10:1-21). Jesus Christ laid down his life for sinners in the world by being crucified on the cross. The hired hand is not the shepherd and does not care when the wolf comes to attack the sheep. His sheep know his voice and he know each one of them. His sheep will listen to his voice.
Those who belong to Christ will listen to him and do what he says. A real Christian follower is obedient in walking in God’s commandment and you can see this in his lifestyle. Faith has deeds. If someone claim to believe in Jesus but does not live out the life of Christ, that person did not completely surrender his life to God. God is merciful and he will always accept back sinners who repent and confess his sins to him. He will never reject those who come to him with a penitent heart, no matter how terrible is your wrongdoing.
The parable of the lost sheep is a same parable as the parable of the lost coin in Luke 15:8-10. In the parable of the lost coin, a woman who own 10 silver coins lost one coin. When she learned that she had lost 1 silver coin, she light a lamp and sweep the entire house in order to find it. When she found it, she calls his friends and neighbors to rejoice with her.
Everyone makes mistake. God wants us to humble ourselves and admit our mistakes to him and ask for his forgiveness when we sins. The sincerity of the heart to repent counts. We must examine our hearts from time to time to see if we have done anything wrong that sins against God. It is best that we examine our hearts every day before we go to bed as we can easily forget the wrong thing that we have done.
But he giveth more grace. Wherefore he saith, God resisteth the proud, but giveth grace unto the humble. (James 4:6 KJV)
The meek will he guide in judgment: and the meek will he teach his way. (Psalm 25:9 KJV)
Pride goeth before destruction, and an haughty spirit before a fall. Better it is to be of an humble spirit with the lowly, than to divide the spoil with the proud. (Proverbs 16:18-19 KJV)
Humble yourselves in the sight of the Lord, and he shall lift you up. (James 4:10 KJV)
This then is the message which we have heard of him, and declare unto you, that God is light, and in him is no darkness at all. If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth: But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin. If we say that we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness. If we say that we have not sinned, we make him a liar, and his word is not in us. (1 John 1:5-10 KJV)
What doth it profit, my brethren, though a man say he hath faith, and have not works? can faith save him? If a brother or sister be naked, and destitute of daily food, and one of you say unto them, Depart in peace, be ye warmed and filled; notwithstanding ye give them not those things which are needful to the body; what doth it profit? Even so faith, if it hath not works, is dead, being alone. (James 2:14-17 KJV)
“For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life. 17 For God did not send his Son into the world to condemn the world, but in order that the world might be saved through him. Whoever believes in him is not condemned, but whoever does not believe is condemned already, because he has not believed in the name of the only Son of God. (John 3:16-18 KJV)
for all have sinned and fall short of the glory of God, (Romans 3:23 KJV)
The Lord is good to all: and his tender mercies are over all his works. (Psalm 145:9 KJV)
All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast out. (John 6:37 KJV)
The LORD is merciful and gracious, slow to anger, and plenteous in mercy. (Psalm 103:8 KJV)
The LORD is longsuffering, and of great mercy, forgiving iniquity and transgression, and by no means clearing the guilty, visiting the iniquity of the fathers upon the children unto the third and fourth generation. (Numbers 14:18 KJV)
But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us. (Romans 5:8 KJV)
And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world. (1 John 2:2 KJV)
For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord. (Romans 6:23 KJV)
For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God. (2 Corinthians 5:21 KJV)
For by grace you have been saved through faith. And this is not your own doing; it is the gift of God, 9 not a result of works, so that no one may boast. (Ephesians 2:8-9 KJV)
But he was pierced for our transgressions; he was crushed for our iniquities; upon him was the chastisement that brought us peace, and with his wounds we are healed. (Isaiah 53:5)
For Christ also suffered once for sins, the righteous for the unrighteous, that he might bring us to God, being put to death in the flesh but made alive in the spirit, (1 Peter 3:18 KJV)
by canceling the record of debt that stood against us with its legal demands. This he set aside, nailing it to the cross. (Colossians 2:14 KJV)
And that he was buried, and that he rose again the third day according to the scriptures (1 Corinthians 15:4 KJV)
Now if Christ be preached that he rose from the dead, how say some among you that there is no resurrection of the dead? But if there be no resurrection of the dead, then is Christ not risen: And if Christ be not risen, then is our preaching vain, and your faith is also vain. Yea, and we are found false witnesses of God; because we have testified of God that he raised up Christ: whom he raised not up, if so be that the dead rise not. For if the dead rise not, then is not Christ raised: And if Christ be not raised, your faith is vain; ye are yet in your sins. Then they also which are fallen asleep in Christ are perished. If in this life only we have hope in Christ, we are of all men most miserable. (1 Corinthians 15:12-19 KJV)