Paul imagines many brethren, but Jesus only a chosen few

For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous.

-- Romans 5:19

For whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the firstborn among many brethren.

-- Romans 8:29

Even as I please all men in all things, not seeking mine own profit, but the [profit] of many, that they may be saved.

-- 1 Corinthians 10:33

And except that the Lord had shortened those days, no flesh should be saved: but for the elect's sake, whom he hath chosen, he hath shortened the days.

-- Mark 13:20

Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.

-- Matthew 7:14

So the last shall be first, and the first last: for many be called, but few chosen.

-- Matthew 20:16