Who are the “lost,” and how does God respond to them? It’s in the Bible, Isaiah 53:6, TLB. “We are the ones who strayed away like sheep! We, who left God’s paths to follow our own. Yet God laid on him [Jesus] the guilt and sins of every one of us!”

“For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life” (John 3:16, NIV).

God seeks and cares for the lost. It's in the Bible, Ezekiel 34:16, NKJV. “I will seek what was lost and bring back what was driven away, bind up the broken and strengthen what was sick; but I will destroy the fat and the strong, and feed them in judgment.”

The lost are of great value to all of heaven. It’s in the Bible, Luke 15:7, TLB. “Heaven will be happier over one lost sinner who returns to God than over ninety-nine others who haven’t strayed away!”

Jesus came to save the lost. It’s in the Bible, Luke 19:10, NKJV. “The Son of Man has come to seek and to save that which was lost.”
Jesus told three stories to illustrate how much God wants to save those who are lost:

The story of the lost sheep. It’s in the Bible, Luke 15:1-7, NIV. “Now the tax collectors and sinners were all gathering around to hear Jesus. But the Pharisees and the teachers of the law muttered, ‘This man welcomes sinners and eats with them.’ Then Jesus told them this parable: ‘Suppose one of you has a hundred sheep and loses one of them. Doesn’t he leave the ninety-nine in the open country and go after the lost sheep until he finds it? And when he finds it, he joyfully puts it on his shoulders and goes home. Then he calls his friends and neighbors together and says, “Rejoice with me; I have found my lost sheep.” I tell you that in the same way there will be more rejoicing in heaven over one sinner who repents than over ninety-nine righteous persons who do not need to repent.’ ”

The story of the lost coin. It’s in the Bible, Luke 15:8-10, NIV. “Or suppose a woman has ten silver coins and loses one. Doesn’t she light a lamp, sweep the house and search carefully until she finds it? And when she finds it, she calls her friends and neighbors together and says, ‘Rejoice with me; I have found my lost coin.’ In the same way, I tell you, there is rejoicing in the presence of the angels of God over one sinner who repents.”

The story of the lost son. It’s in the Bible, Luke 15:11-32, NIV. “There was a man who had two sons. The younger one said to his father, ‘Father, give me my share of the estate.’ So he divided his property between them. Not long after that, the younger son got together all he had, set off for a distant country and there squandered his wealth in wild living. After he had spent everything, there was a severe famine in that whole country, and he began to be in need. So he went and hired himself out to a citizen of that country, who sent him to his fields to feed pigs. He longed to fill his stomach with the pods that the pigs were eating, but no one gave him anything. When he came to his senses, he said, ‘How many of my father’s hired servants have food to spare, and here I am starving to death! I will set out and go back to my father and say to him: Father, I have sinned against heaven and against you. I am no longer worthy to be called your son; make me like one of your hired servants.’ So he got up and went to his father. But while he was still a long way off, his father saw him and was filled with compassion for him; he ran to his son, threw his arms around him and kissed him. The son said to him, ‘Father, I have sinned against heaven and against you. I am no longer worthy to be called your son.’ But the father said to his servants, ‘Quick! Bring the best robe and put it on him. Put a ring on his finger and sandals on his feet. Bring the fattened calf and kill it. Let’s have a feast and celebrate. For this son of mine was dead and is alive again; he was lost and is found.’ So they began to celebrate. Meanwhile, the older son was in the field. When he came near the house, he heard music and dancing. So he called one of the servants and asked him what was going on. ‘Your brother has come,’ he replied, ‘and your father has killed the fattened calf because he has him back safe and sound.’ The older brother became angry and refused to go in. So his father went out and pleaded with him. But he answered his father, ‘Look! All these years I’ve been slaving for you and never disobeyed your orders. Yet you never gave me even a young goat so I could celebrate with my friends. But when this son of yours who has squandered your property with prostitutes comes home, you kill the fattened calf for him!’ ‘My son,’ the father said, ‘you are always with me, and everything I have is yours. But we had to celebrate and be glad, because this brother of yours was dead and is alive again; he was lost and is found.’ ”