In accordance with the timing and the provisions (Genesis 18: 13, 14) of God, Isaac was born to Abraham and Sarah.
In keeping with the Abrahamic Covenant (Genesis 17:2), and in acknowledgement of Isaac’s inclusion and role God’s plan of salvation (Genesis 17:19), Isaac was circumcised on the eighth day of his life.
In doing so, Isaac was identified as being one of God’s chosen people for the dispensation in which he was born into, and with a specific part that he was to play to the unfolding plan of God for entire human race.
In the same way, following one’s spiritual birth (John 3:3), the believers of the Church Age are baptized (identified) as being one of God’s chosen people for the dispensation in which we are born into, and with a specific part (1Cor. 12:18) to play.
The circumcision in which Isaac underwent was physical in nature and without his knowledge or consent as to what was taking place.
Christian religion(s) have adopted similar rituals of initiation in which infants, without their consent or knowledge of participation, are baptized in or with water. This practice, however, is contrary to the water baptisms of Scripture, in which those baptized in water, were consenting adults and after they were already saved.
The command to baptize in the name of the Father, Son, and Holy spirit pertains to the proclamation of the Gospel Message and the regeneration (Titus 3:5) of the dead human spirit that is the Work of God and automatically takes place at the moment of salvation. Biblical baptism has to do with identification, not salvation.
Satan, through religion, misuses this ritual as the means to ensnare recruits into a life of religious bondage in which God never designed for Church Age believer.
The baptizing of Church Age believers is spiritual in nature. It is not done by the hands of a human priest, as there are no such "priests" authorized for the Church Age. This baptism is not to erase "original sin", as ALL sin was addressed through and by the Person and Work of the Lord Jesus Christ. This baptism is NOT the same as the baptism that the Lord Jesus Christ received, as His baptism identified Him with the Work that He was to accomplish. This baptism is NOT the same as the the baptism offered by John to his followers, as that baptism identified the recipients with John's message of repentance and the need to focus on the (then) coming Messiah.
The "ONE (Ephesians 4:5)" form of baptism for Church Age believers is the work of God (Titus 3:5) that automatically takes place at the moment of salvation.
Salvation takes place as of the time that one knowingly chooses to believe (John 3: 18) in God, to the extent that God reveals Himself to each soul, with the Gospel Message being the ultimate means of revelation. While believing in a presentation of the TRUE Gospel results in one being forever assured of his/her salvation, disbelieving in a presentation of the true Gospel Message assures one of an eternity in Hell, or what the Bible calls the lake of fire (Rev. 20:15).
With the disclosure of the part that Isaac would play (Gen.17:21), The plan of God was becoming more defined. Since it was through the family line of Isaac that our Lord’s humanity was to come, the spiritual combat of the angelic conflict would now call for an attack on that part of God’s plan, as well as to continue to promote false religious alternatives that Satan offers to the human race at large.
Satan and the Ephesians 6:12 forces use the followers of false religions as tools in his/their hands to oppose the forward progress of all believers in each dispensation of the plan of God.
Abraham, now having received the promised heir, would be put through an event that would teach both Abraham and the observing beings in the spiritual realm, the inevitability of the fulfillment of the plan of God, no matter what events would come against it.
Initially, it had to appear the God was arranging for the very means to terminate His own stated plan for the life and purpose of Isaac, calling for the (fatal) sacrifice of Isaac on an altar that Abraham was instructed to build and place Isaac on (Genesis 22:2).
Satan was undoubtedly baffled as to what this event was meant to accomplish. He likely rationalized that he had nothing to lose by allowing it to unfold.
Abraham’s faith was put to the test. He had already been told what part Isaac was to play in the plan of God, but Abraham was now challenged to go along with what appeared to be totally contrary to Isaac's calling, as far as human logic could rationalize.
Keep in mind that God knows the future as well as the past, and what God knew at the time was that when the moment came, He would provide animal for the sacrifice, and that His stated plan for Isaac was going to go forward.
Because Abraham (and we) was not privy to knowledge of the future, he (and we) was going to be put in a situations where he was going to challenged to do something that did NOT make sense.
I am sure that Abraham had to be confused when he was initially called upon to make a human sacrifice to the God of the Bible, but making human sacrifices was popular within the false worship circles of his day.
Even if God were to later provide another heir to be the means of eventually bringing about the humanity of the Lord Jesus Christ, it would have meant that God’s stated plan involving Isaac had failed.
Burnt offerings required the slaying of the sacrifice, and then the burning up of the remains.
The only way that Abraham was able to bring himself to be in a position to do such a thing would have been for him to believe that if Isaac was slain, that God would raise him from the dead. One way or another, if God was going to be true to His Word, then Isaac was going to walk away from this scenario alive and well!
There are many symbolic lessons that we can take from this incident, but the primary one, as it pertains to our study of the Angelic Conflict, is that no matter what happens, God is in charge and that by whatever means He chooses, His plan will be manifested.
In the course of time, Isaac would be the means through which Jacob and the tribes of the natioin of Israel would descend.
There would be conflicts between Jacob (later named Israel) and his brother Esau, their descendants, and conspiracies and betrayals among these sons of Israel, but God would cause all these things to eventually bring descendants of Isaac to the Promised Land. Some of these issues would continue on down through the Ages and be factors in the End Time events.
In the course of these events, Satan would make use of each and every opportunity to oppress the chosen the descendants of Abraham, Isaac, and Jacob (Israel) of God. Accordingly, the eliminating the sons of Isaac, both in Judah and among the lost (northern tribes of Israel, would mean victory for the devil in the Angelic Conflict, as without the these peoples, God’s stated plan for the human race could not be fulfilled.