How does a person become born again, BEFORE he hears and believes the Gospel?
IOW, according to the scriptures.
They are born again when they are indwelt by the Holy Spirit. Unless one has been given ears by God that can hear
spiritually (through becoming born again), no matter how many times they may hear the Gospel with earthly ears, they will never gain an understanding or perception of its truth. Nevertheless, for those who have received spiritual ears, when they hear, their faith will grow.
[Rom 12:2 KJV]
2 And be not conformed to this world:
but be ye transformed by the renewing of your mind, that ye may prove what [is] that
good, and acceptable, and perfect, will of God.
[Tit 3:5 KJV] 5
Not by works of righteousness which we have done, but a
ccording to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;
[Rom 11:6-8 KJV]
6 And if by grace, then [is it] no more of works: otherwise grace is no more grace. But if [it be] of works, then is it no more grace: otherwise work is no more work.
7 What then? Israel hath not obtained that which he seeketh for;
but the election hath obtained it, and the rest were blinded
8 (According as it is written,
God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear;) unto this day.
[Eph 4:21, 23-24 KJV]
21 If so be that ye have heard him,
and have been taught by him, as the truth is in Jesus: ...
23
And be renewed in the spirit of your mind;
24 And that ye put on the
new man, which after God is created in righteousness and true holiness.
[Col 3:10 KJV]
10 And have put on the new [man], which is
renewed in knowledge after the image of him that created him:
“If God does it all” then why does He instruct us to obey the Gospel.
You'd probably need to tell me exactly which verses you have in mind by "obey the Gospel" for a more specific answer, but generally speaking, when someone becomes born again they're not immediately imbued with all spiritual knowledge. Through the preaching and reading of the true Gospel does spiritual knowledge grow. The overriding and unifying doctrine of which that they should obey, is that Christ is Lord, Savior and God, and that faith should be in Him and not themselves. Of course until born again, the spiritually correct understanding of that message will fall on deaf ears.
Why did Jesus Christ suffer and die an extremely excruciating death if there were some other way?
Don't know what you mean? What other way? There is no other way. What Christ had to endure to remit sin was established by the God the Father. However, theoretically speaking, if Christ did not undergo it, or was unsuccessful (which was impossible), then the Holy Spirit could not have been given, salvation would be impossible, and a new heaven, new earth and new Holy City could not have been established nor occupied.
Please share the scripture with us that says we are born again, apart from the Gospel of Jesus Christ; apart from the knowledge of Christ?
Being born again is a result of being indwelt by the Holy Spirit. The Holy Spirt uses the Gospel to give a correct understanding of spiritual doctrine that it alone contains, to those who have become born again. I do not believe it happens in the reverse; that is, hearing the Gospel first, then, should the hearer come to the correct understanding of it, and faith in it, to be indwelt by the Holy Spirit - God must do it all. Please see the above verses
My reply above isn't intended to be a full and complete treatise on all aspects of salvation. only
to answer the best I can, the immediate questions you've asked above. There are many other aspects that could be discussed and debated and I don't mean to imply or suggest otherwise.