Galatians 4:16-17 KJV
[16] Am I therefore become your enemy, because I tell you the truth?
[17] They zealously affect you, but not well; yea, they would exclude you, that ye might affect them.
[18] But it is good to be zealously affected always in a good thing, and not only when I am present with you.
[19] My little children, of whom I travail in birth again until Christ be formed in you, [20] I desire to be present with you now, and to change my voice; for I stand in doubt of you.
[21] Tell me, ye that desire to be under the law, do ye not hear the law? [22] For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman. [23] But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise. [24] Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar. [25] For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.
[26] But Jerusalem which is above is free, which is the mother of us all. [27] For it is written, Rejoice, thou barren that bearest not; break forth and cry, thou that travailest not: for the desolate hath many more children than she which hath an husband.
[28] Now we, brethren, as Isaac was, are the children of promise. [29] But as then he that was born after the flesh persecuted him that was born after the Spirit, even so it is now. [30] Nevertheless what saith the scripture? Cast out the bondwoman and her son: for the son of the bondwoman shall not be heir with the son of the freewoman. [31] So then, brethren, we are not children of the bondwoman, but of the free.
Let that sink in.