Many but not all are called.
26: For ye see your calling, brethren, how that not many wise men after the flesh, not many mighty, not many noble, are called: 1 Cor. 1:26
Not everyone is called.
48: And when the Gentiles heard this, they were glad, and glorified the word of the Lord: and as many as were ordained to eternal life believed.
Acts 13:48
Out of those who are called not all of them will be chosen.
4: Thou hast a few names even in Sardis which have not defiled their garments; and they shall walk with me in white: for they are worthy.
5: He that overcometh, the same shall be clothed in white raiment; and I will not blot out his name out of the book of life, but I will confess his name before my Father, and before his angels.
Rev. 3:4-5
Only the overcomers will be finally saved.