'Lost' in the Bible

Ye are the salt of the earth: but if the salt have lost his savour, wherewith shall it be salted? it is thenceforth good for nothing, but to be cast out, and to be trodden under foot of men.

But go rather to the lost sheep of the house of Israel.

'He who found his life shall lose it, and he who lost his life for my sake shall find it.

But he answered and said, I am not sent but unto the lost sheep of the house of Israel.

For the Son of man is come to save that which was lost.

“What do you think? If a man has a hundred sheep, and one of them gets lost, will he not leave the ninety-nine on the mountain and go in search of the one that is lost?

And if it turns out that he finds it, I assure you and most solemnly say to you, he rejoices over it more than over the ninety-nine that did not get lost.

In the same way, it is not the will of your Father in heaven that one of these little ones should be lost."