I disagree with your statement that justification can be lost.
Salvation: Eternal deliverance granted immediately
Vine's Expository Dictionary of NT Words: Salvation
(2/b) of the spiritual and eternal deliverance granted immediately by God to those who accept His conditions of repentance and faith in the Lord Jesus, in whom alone it is to be obtained, Acts 4:12 , and upon confession of Him as Lord, Romans 10:10 ; for this purpose the gospel is the saving instrument, Romans 1:16 ; Ephesians 1:13 (see further under SAVE);
(MY NOTE: "ETERNAL DELIVERANCE GRANTED IMMEDIATELY" by belie/faith in the Lord Jesus death & resurrection)
Mark 1:8 I indeed have baptized you with water: but he shall baptize you with the Holy Ghost.
(MY NOTE: He shall baptize you with the Holy Ghost. Also see Mat 3:11, Lk 3:16 & Jn 1:33)
Christ's Holy Spirit, "eternal sealing's/NT/Body of Christ" don't begin until after Jesus death & resurrection:
Jn 7:39 (But this spake he of the Spirit, which they that believe on him should receive: for the Holy Ghost was not yet given; because that Jesus was not yet glorified.)
2 Tim 1:14 Refers to the Holy Spirit as a Good Deposit.
2 Cor 5:5, Eph 1:14 & 2 Cor 1:22. Refer to the Holy Spirit as "the earnest" = Deposit or Pledge.
Eph 1:13, 2 Cor 1:22 & Eph 4:30 Refer to the Holy Spirit as a Seal.
2 Tim 1:14 The Holy Spirit who dwells within us, guard the good deposit entrusted to you
(MY NOTE: The Holy Spirit dwelling within us. Is God's good deposit given us until the day of redemption)
2 Cor 5:5 God, who also hath given unto us the "earnest" of the Spirit
(MY NOTE: God's Holy Spirit dwelling within us is the earnest. Earnest translated from the Greek word: arrabon. Also means a deposit/pledge.
2 Cor 1:22 Who hath also "sealed us" & "given the earnest" of the Holy Spirit in our hearts
(MY NOTE: God has placed His Holy Spirit in the believers heart. As a DEPOSIT/PLEDGE & SEAL, until the soon coming day of our final redemption)
Eph 1:13 In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise,
(MY NOTE: You heard about Christ's finished sin redemptive payment & resurrection. When you believed/trusted, Christ sealed/baptized you with His Holy Spirit).
Eph1:14 Which is the "earnest" of our inheritance until the redemption of the purchased possession
(MY NOTE: The Holy Spirit by which only Christ baptizes/seals & indwells us. Is God's earnest = a down paymnt/pledge)
Eph 4:30 grieve not the holy Spirit of God, whereby ye are "sealed" unto the day of redemption
(MY NOTE: Believers are SEALED until their nest unrepentant sin? NO! SEALED until the day they receive their heavenly body. Christ's indwelling Holy Spirit is Christ's pledge/promise that he will come for every believer. The jews received tis Promise At the Acts 2 Pentecost, the gentiles at Acts 10 Cornelius & now any/evert jew of gentile that believes is Christ death & resurrection.)
1 Jn 5:13 13 These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God.
(MY NOTE: That you may know ""PRESENT TENSE"" that you have eternal life. Who shall know? The Mosaic law promoters of good self-works? NO! Those that believe on the name of the Son of God!)
Acts 10:
44 While Peter was still speaking these words, the Holy Spirit fell on all those who were listening to the message [confirming God’s acceptance of Gentiles].
(MY NOTE: As Peter spoke, (Faith comes by hearing - Rom 10:17) those hearing believed & received Christ's eternal salvation sealing forever indwelling Holy Spirit. Void of anything beyond FAITH ALONE!)
45 All the circumcised believers who came with Peter were amazed, because the gift of the Holy Spirit had been poured out even on the Gentiles
(MY NOTE: Thru faith alone, (VIOD OF ANY ADHERENCE TO MOSAIC ANYTHING!) these gentiles are quickened (Eph 2:1, 2:5, Col 2:13) justified by God/Christ & given declaration of righteousness/a right standing with the Father. FOREVER Sealed (Jn 14:16) with Christ's eternal life giving Holy Spirit (2 Cor 1:22, 5:5, 2 Tim 1:14, Eph 4:30) The GIFT of the Holy Spirit is FOREVER! (Jn 14:16)
Romans 11:29 For the gifts and calling of God are without repentance.
(NOTE: God doesn't go back on His Word or Promises)