Tenses for verbs and participles may be chosen by the writer or author to reflect the time aspect of events or happenings from his standpoint (at the time of his writing). The perfect indicative of "begotten" represents an action occurring prior to the time of the author's utterance of the fact.
There are Christians who persevered in their believing and there are those who fell away in the epistle of John, who did not abide in faith or continue believing. John says something about those who were not of this class of believers, but rather of that class of believers who persisted in their belief of the word of God, of those who habitually believe that Jesus is the Christ. John is observing things from his point in time and the people he wishes to make a predicate statement regarding are people who are characterized in their creed and conduct as believers, and people who do not quit believing and adhering. He says of them as a class that they "have been born of God." What other tense could he possibly use?
He could have used the present tense for "is begotten" and if viewed linearly then the birth would be seen as a process rather than as a one time act (a view held by many, including Baptists who saw birth as a process from conception to birth). But, this also would have given the idea that maybe such believers were not yet fully born and fail to foster assurance of present salvation. He could have used the aorist present or aorist perfect tense and if the latter, then it would simply be an affirmation that regular believers were born of God without any idea as to the time when it occurred. It would then be only simple statement of fact that it had occurred sometime in the past. But, this too would not be acceptable for the aorist perfect does not allow for effects of that past event to be continuing in the present. The aorist simply states the fact that an action has happened. It gives no information on how long it took, or whether the results are still in effect.
So, the perfect tense for "begotten" is the only possible way of expressing that action, especially as it relates to those who of the believing class. Such a perfect tense verb when used with a gnomic present subjunctive participle does not indicate, in this case, that the action of being born preceded the action of believing.
The perfect tense of "begotten" indicates a completed action or existing state relative to the time of the speaker or writer. So John is telling his readers that the new birth of all those continually believing that Jesus is the Christ is completed. This serves John’s overall purpose of allowing his readers to know that they have eternal life by providing them tests. Do I have ongoing faith? Yes? That means I was born again at some time in the past.
Gnomic & Universal Present
"All thinking people (present active) have come to realize (perfect passive) this truth."
This sentence is structured just as I John 5: 1. Do we mean by the above sentence that realization occurred before and caused the thinking? No; And the reason is that "thinking people" is a gnomic present tense, a universal present. So too in I John 5: 1. So we can say "all thinking people" means "all thinkers of the past, present and future."
Greek professor Daniel Wallace wrote the following about the "gnomic present":
“The gnomic present is distinct from the customary present in that customary present refers to a regularly recurring action while the gnomic present refers to a general, timeless fact…The gnomic present is generally atemporal.”
That is probably the case with I John 5: 1 and I John 2: 29. Said Wallace further:
"Further, the present participle, especially in such formulaic expression Πᾶς ὁ + present participle and the like, routinely belong here." (Greek Grammar here)
Πᾶς ὁ + present participle is what we have in I John 5: 1 and Wallace says such expression "routinely belongs" to such a gnomic class of present tense.
The gnomic present is the present tense used to make a statement of a general, timeless fact. It does not say that something is happening, but that something does happen. The action or state continues without time limits. An example of this is in 2 Cor 9: 7 - "God loves [as a general, timeless fact] a cheerful giver." The gnomic present is used to express a universal truth, a maxim, a commonly accepted fact, a state or condition which perpetually exists, and a very widespread practice or custom.
Wallace (pp. 615-616) continues, “Many substantival participles in the NT are used in generic utterances" and says that "most of these instances involve the present participle." I John 5: 1 is an example of this kind of substantive participle. I John 5: 1 was a maxim in John's day and it has continued to be such since within the Christian community.
Thus, by "all believing persons" we may interpret as "all who have believed in the past, present, or future have been born of God." And, such a structure does not affirm that the birth occurred prior to and caused the believing. John certainly understood that the believers he was encouraging were not only presently believing but that they had been believing for quite awhile. The universal aspect of the present tense in such gnomic presents would include the idea of a past believing as well as the present continuation of that believing. Thus we may view the words of John as saying "all who have believed and are still believing now have been born of God." In this case there is no precedent in time between believing and being born.
There are also what are called "Broad-Band Presents," where the present tense is used to describe an action that, begun in the past, continues in the present, though the emphasis is on the present time. Luke 15: 29 - "I have served you (present) for these many years." Here the present tense includes the past tense. There is also the "Iterative Present," where the present tense may be used to describe an event that repeatedly happens. There is also the "customary" or general present which denotes lifestyle, what is customary. The customary present is used to signal either (1) an action that regularly occurs or (2) an ongoing state. The action is usually iterative, or repeated, but not without interruption. Luke 18:12 I [customarily] fast twice a week. 1 John 3: 6 "No one who lives in him keeps on sinning [as a lifestyle]." There is also what is called the "Durative Present" and is an action or a state of being which began in the past and is described as continuing until the present. Again, that may very well be the kind of present in I John 5: 1.
If "whosoever is believing" is a gnomic present participle or a durative present, then we should view the words in this manner - "whoever has in the past believed and continues to believe has been born of God." "Whoever is believing" therefore does not exclude the idea of past believing. We cannot construe John to be saying "whoever is now believing (but not in the past) has been born of God."
Also, John's intention is not to say that birth produces faith (for this would be to contradict what he elsewhere taught in agreement with other apostle's teachings).
The structure of John's maxim, as well as John's intent, was not to show that the birth produced the faith but to show that both are coterminous. Where there is ongoing faith there is begotten status, and where there is begotten status there is faith. This is because they are inseparably joined and so we say that whoever has faith has experienced new birth and whoever has experienced the birth has faith. In other words, where there is no faith there is no birth, and where there is no birth there is no faith.
Paul says we are "sons of God by faith in Christ." (Gal. 3: 26) They are sons by birth, but the birth that makes sons is by faith.
John said "to as many as received him to them gave he the right to become the children of God." (John 1: 12) Here clearly birth follows believing and receiving, that is to say, it follows union with Christ."Becoming children" (tekna denoting one begotten) of God follows receiving Christ. It must be so because faith is the medium of union with Christ.
A similar present active participle are the words "ho baptizon" = "the baptizing one" or "the Baptist." But, that is what may be said at any time, even at times when John was not presently baptizing. It would include his practice of baptizing, whether in the past or present, or future. So we may view the present participle of I John 5: 1 similarly and say "the believing ones" and this would not exclude their past believing.
The conclusion of all this leads us to say that if we allow that the present tense nominative active participle, a substantive, "the ones believing" (ὁ πιστεύων) includes past believing, then the argument for the past tense of "begotten" (have been begotten) becomes null and void.
Born Through The Preached Word