Do you affirm this? OR, do you believe that justification is eternal or something else?

I believe Justification is in 3 phases:

Eternal Justification in the Mind and Purpose of God premised on the Cross of Christ in time, but Christ was made a surety before time of a better covenant Heb 7:22

22 by so much was Jesus made a surety of a better testament. I believe this is also the everlasting covenant Heb 13:20

20 Now the God of peace, that brought again from the dead our Lord Jesus, that great shepherd of the sheep, through the blood of the everlasting covenant,

Then I believe in legal Justification based solely on the Blood of Christ Rom 5:9; The Grace of God Rom 3:24

Then Justification by Faith Rom 5:1 when the Justification is applied spiritually to the mind of the Justified. This is the Spirits work in Justification when the Justified sinner receives the Spiritual knowledge of their Justification by the Gospel. The Gospel reveals Justification/righteousness to Faith Rom 1:16-17

16 For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek. 17 For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith.

That Righteousness revealed is also their Justification they had prior to it being revealed.

There will be a 4th aspect of Justification when Christ at His second coming Justifies His People before the whole universe, or show them to be !