Dit is wat Calvijn zegd over 1Kor 7:
Else were your children. It is an argument taken from the effect -- "If your marriage were impure, then the children that are the fruit of it would be impure; but they are holy; hence the marriage also is holy. As, then, the ungodliness of one of the parents does not hinder the children that are born from being holy, so neither does it hinder the marriage from being pure." Some grammarians explain this passage as referring to a civil sanctity, in respect of the children being reckoned legitimate, but in this respect the condition of unbelievers is in no degree worse. That exposition, therefore, cannot stand. Besides, it is certain that Paul designed here to remove scruples of conscience, lest any one should think (as I have said) that he had contracted defilement. The passage, then, is a remarkable one, and drawn from the depths of theology; for it teaches, that the children of the pious are set apart from others by a sort of exclusive privilege, so as to be reckoned holy in the Church.
But how will this statement correspond with what he teaches elsewhere -- that we are all by nature children of wrath; (Ephesians 2:3;) or with the statement of David -- Behold I was conceived in sin, etc. (Psalms 51:7.) I answer, that there is a universal propagation of sin and damnation throughout the seed of Adam, and all, therefore, to a man, are included in this curse, whether they are the offspring of believers or of the ungodly; for it is not as regenerated by the Spirit, that believers beget children after the flesh. The natural condition, therefore, of all is alike, so that they are liable equally to sin and to eternal death. As to the Apostle's assigning here a peculiar privilege to the children of believers, this flows from the blessing of the covenant, by the intervention of which the curse of nature is removed; and those who were by nature unholy are consecrated to God by grace. Hence Paul argues, in his Epistle to the Romans, (Romans 11:16,) that the whole of Abraham's posterity are holy, because God had made a covenant. of life with him -- If the root be holy, says he, then the branches are holy also. And God calls all that were descended from Israel his sons' now that the partition is broken down, the same covenant of salvation that was entered into with the seed of Abraham 4 is communicated to us. But if the children of believers are exempted from the common lot of mankind, so as to be set apart to the Lord, why should we keep them back from the sign? If the Lord admits them into the Church by his word, why should we refuse them the sign? In what respects the offspring of the pious are holy, while many of them become degenerate, you will find explained in the tenth and eleventh chapters of the Epistle to the Romans; and I have handled this point there.
Hier blijkt dan dat we in Rom. 10/11 moeten zoeken
Mijn enige troost is, dat ik niet mijn, maar Jezus Christus eigen ben, Die voor mijn zonden betaald heeft, en zo bewaart, dat alles tot mijn zaligheid dienen moet; waarom Hij mij ook door Zijn Heilige Geest van eeuwig leven verzekert, en Hem voortaan te leven van harte willig en bereid maakt.