Tertullian was a theologian in Carthage in the second century A.D. He said “Christians are made not born.” He also seemed to believe that the reason why God knows what is going to happen is because he (fore)ordained it. If this is so, it would mean that God foreknows those who are going to be saved because he fore-ordained, or predestined, it. Yet Tertullian seems to lean more to the synergist view of regeneration (born again) where man cooperates with God in regeneration. In light of this, what he seems to have meant by “Christians are made not born” is that God wants everybody to be born “again” and provides the incentive (“prevenient grace”), but only your free will can make it happen.
Say, Augustine of Hippo, Tertullian’s successsor, had said “Christians are made not born.” This is what he would have meant: it is God alone who makes you a Christian, makes you born “again.” John 3:8 The wind blows where it wills, and you hear the voice thereof, but know not whence it comes, and whither it goes: so is every one that is born of the Spirit. And for added treasure: John 1:12-13 As many as received him, to them gave he the right to become children of God, even to them that believe on his name: 13 who were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
The scriptures are grammatically crystal clear: God both proposes and disposes; in one word, predestines a person for salvation. This person may be you, which is why I’m writing to you.