Matthew 22:14 ...'For many are called, but few are chosen.'
Matthew 24:13 … 'But the one who endures to the end will be delivered.'
Revelation 2:19 … 'Be faithful until death, and I will give you the crown of life.'
Remember, Matthew was Jesus speaking to the you, not Christians.
Revelation 2:19 New International Version (NIV)
19 I know your deeds, your love and faith, your service and perseverance, and that you are now doing more than you did at first.
But it does not say born again.
The point being you can use these verses to say one can lose his salvation.
Romans 8 is solid OSAS.
Berean misquoted revelation.
Revelation 2
8 And unto the angel of the church in Smyrna write; These things saith the first and the last, which was dead, and is alive;
9 I know thy works, and tribulation, and poverty, (but thou art rich) and I know the blasphemy of them which say they are Jews, and are not, but are the synagogue of Satan.
10 Fear none of those things which thou shalt suffer: behold, the devil shall cast some of you into prison, that ye may be tried; and ye shall have tribulation ten days: be thou faithful unto death, and I will give thee a crown of life.
Reward, not salvation.