John 10:27 - My sheep hear My voice (not some of them do and some of them don't), and I know them (not some of them I know and some of them I don't know), and they follow Me (not some of them follow me and some of them don't). 28 And I give them eternal life, and they shall never perish (not some of them I give eternal life and shall never perish and some I don't give them eternal life and they shall perish); neither shall anyone snatch them out of My hand (not some of them will not be snatched out of my hand and some of them will be snatched out of My hand).His sheep who hear and obey His voice, are those who follow Him, and no one can snatch them out of His hand.
OXYMORON.Sheep who hear His voice but don’t obey, end up becoming lost.
Matthew 5:5 - These twelve Jesus sent out and commanded them, saying: “Do not go into the way of the Gentiles, and do not enter a city of the Samaritans. 6 But go rather to the lost sheep of the house of Israel.Lost sheep are no longer reconciled to Him.
In Luke 19:10, we read - for the Son of Man has come to seek and to save that which was lost.”
*Not lost his salvation and has to get it back again.