I understand, but it is not the Scriptural model. It is the invention of men with very elaborate reasoning behind it.
The Scriptural model is not explicit when referring to infant baptism. In the NT, whole households were baptized - not whole households minus the infants - and so therefore there is precedence.
It is the development of the Church that the infant model needed to be taken to the point where the necessity of baptism be given to all as soon as is practicable, and yet have that requirement that belief be in place. Thus, the split in the Church between the moment of baptism and the acknowledgement of those mature enough to be able to confirm that they are willing to be baptized.
You must remember that Jesus left us His Church; that Church is the teaching institution and there is no other outside of private revelation of the Holy Spirit. We examine the proofs of private revelation in order to determine their accuracy or even origin, but we are subordinate to the Holy Spirit. We have not made God in our own image, as is the apparent practice of many Protestants, especially the Calvinists.
***It is the invention of men with very elaborate reasoning behind it.***
We must also differentiate between the doings of individual or groups of men and the Church.
That by itself should be the deciding factor between choosing the words of Calvin (or Luther or Mary Baker Eddy or Joseph Smith or Jimmy Swaggart) and those of the Church.
Orthodox baptism involves immersing three times (baptiso means repeatedly and affecting permanent change, as opposed to bapto which means once) for obvious reasons (Father, Son, Hoy Spirit), immediately followed by the seal (chrism).
Baptism is absolutely necessary for salvation. One is not brought into the Church unless he or she is baptized. As Christians, we are commanded to baptize (please tell St. Paul!), no ifs and buts about it.
If God wants to save unbaptized people that's His prerogative. Not ours.
Besides, Presbyterians also baptize their infants.
The oldest Christian graves show that many of the deceased were infants. The inscriptions found on their tombstones leave little doubt that they were "servants of God."