Come on... THINK!
How can this be?
“That which is born of the flesh is flesh,
and that which is born of the Spirit is spirit." John 3:6
Why should the Holy Spirit beget a human spirit?
If all unregenerate souls have a human spirit?
It is a spirit uniquely given to us when we are born again.
Here is not speaking of the Holy Spirit, but our human spirit.
May God himself, the God of peace, sanctify you through and through.
May your whole spirit, soul and body be kept blameless at the coming
of our Lord Jesus Christ." 1 Thessalonians 5:23
OT believers received a human spirit when they believed. Not the indwelling Holy Spirit.
Remember him—before the silver cord is severed,
and the golden bowl is broken;
before the pitcher is shattered at the spring,
and the wheel broken at the well,
and the dust returns to the ground it came from,
and the spirit returns to God who gave it. Ecclesiastes 12:6-7
The indwelling Holy Spirit came only with the Church age.
All believers throughout time were
GIVEN by God a human spirit!
And the dust returns to the ground it came from,
and the spirit returns to God who gave it."
It is the Word of God.