For the Son of man is come to save that which was lost.
The Son of man; who is this Son of man?
Matthew 8:20
And Jesus saith unto him, The foxes have holes, and the birds of the air have nests; but the Son of man hath not where to lay his head.
Matthew 9:6
But that ye may know that the Son of man hath power on earth to forgive sins, (then saith he to the sick of the palsy,) Arise, take up thy bed, and go unto thine house.
Without doubt the Son of man is none other than the Lord Jesus Christ. His purpose for coming to this earth is the save sinners from an awful place called hell. It's wonderful that He does so much more but the main reason for His coming is to save sinners or the lost.
The apostle Paul said it this way.
1 Timothy 1:15
This is a faithful saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief.
Not only did Jesus come to save sinners but also to keep the saved.
John 18:9
That the saying might be fulfilled, which he spake, Of them which thou gavest me have I lost none.
Jesus is not just in the saving sinners business He is also in the keeping saints business.
Matthew 18:12
How think ye? if a man have an hundred sheep, and one of them be gone astray, doth he not leave the ninety and nine, and goeth into the mountains, and seeketh that which is gone astray?
ASTRAY "Out of the right way or proper place, it signifies wandering from the path."
Here we see a picture of a sheep going astray . The Shepherd leaves the rest of his sheep and goes back and finds the one that went astray. For God so loved that He gave but God so loves that He goes. If a parent looks around and their child is missing they immediately go in search for their child.
Luke 2:43
And when they had fulfilled the days, as they returned, the child Jesus tarried behind in Jerusalem; and Joseph and his mother knew not of it.
44 But they, supposing him to have been in the company, went a day's journey; and they sought him among their kinsfolk and acquaintance.
45 And when they found him not, they turned back again to Jerusalem, seeking him.
If your child is missing you stop what you are doing and nothing is more important than finding that child. The Lord is no different He goes seeking to bring that sheep back to the fold.
Matthew 18:13
And if so be that he find it, verily I say unto you, he rejoiceth more of that sheep, than of the ninety and nine which went not astray.
Why does He do this?
Matthew 18:14
Even so it is not the will of your Father which is in heaven, that one of these little ones should perish.
John 3:16
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.