Before the foundation of the world

And Jehovah God layeth a charge on the man, saying, 'Of every tree of the garden eating thou dost eat; and of the tree of knowledge of good and evil, thou dost not eat of it, for in the day of thine eating of it -- dying thou dost die.' ' Gen 2:16,17 YLT

What was going to be?

the substance of things hoped for, the evidence of things not seen. From Hebrews 11:1

Relative to?

In hope of eternal life, which God, that cannot lie, promised before the world began; Titus 1:2


You, what you do, what you think, has zilch to do with the answer

I believe the correct answer is, "the death and resurrection of Christ out of the dead," to be, the substance of things hoped for, the evidence of things not seen.

The faith of God .Mark 11:11

Jesus was the obedience of faith.

It brings about the means by which the devil and his works are to be destroyed.

 

Keeping in mind the OP

A. And when the woman saw that the tree was good for food, and that it was pleasant to the eyes, and a tree to be desired to make one wise, she took of the fruit thereof, and did eat, and gave also unto her husband with her; and he did eat. Gen 3:6

B. because we have not the wrestling with blood and flesh, but with the principalities, with the authorities, with the world-rulers of the darkness of this age, with the spiritual things of the evil in the heavenly places; Eph 6:12

Did A take place because B was a reality? Had the devil already been at work?

 

A process?

according as He did choose us in him before the foundation of the world, for our being holy and unblemished before Him, in love, having foreordained (predestined) us to the adoption of sons through Jesus Christ to Himself, according to the good pleasure of His will, Eph 1:4,5

Why do they believe? Is it because they were chosen, to believe, predestined, to believe, to be of the faith of Christ? The faith of God?

Eph 1:9 YLT having made known to us the secret of His will, according to His good pleasure, that He purposed in Himself,

Us, us who? The, chosen, the predestined? Made known what?

V 10 in regard to the dispensation of the fulness of the times, to bring into one the whole in the Christ, both the things in the heavens, and the things upon the earth -- in him;

What does that verse mean? What does it have to do with the devil? Does it have anything to do with the promise of God? What about dying thou dost die?

 

Does the Holy Spirit have anything to do with the above? What Holy Spirit? This?

John 7:39 and this he said of the Spirit, which those believing in him were about to receive; for not yet was the Holy Spirit, because Jesus was not yet glorified.

John 7:37 And in the last, the great day of the feast, Jesus stood and cried, saying, 'If any one doth thirst, let him come unto me and drink;

I wonder if the great day of the feast, has anything to do with, process?