You're the one who changed it to comparing apples and oranges, not me. See, you defined "never leave nor forsake you" in Deuteronomy 31:6 as 'the Holy Spirit will never leave you in salvation'. But then, in that same passage in vs. 17 where God gives the reason why he will leave and forsake them, it suddenly doesn't mean losing salvation anymore, but losing blessing. That's a convenient way to defend your OSAS belief but it's not an honest way.
Here's the reason why I believe a believer in Christ cannot loose his/her salvation, too many promises as written in scriptures...
2Co_1:22 Who hath also sealed us, and given the earnest of the Spirit in our hearts.
Why give it in the first place, IF we are to lose it?
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,
Why seal us with the Holy Spirit IF we are to be unsealed?
Eph_4:30 And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.
Note here, unto the day of redemption
In whom also, &c.] Better, In Whom moreover, on believing, ye were sealed, &c. The Gr. does not forbid the rendering, “on believing in Whom;” but this demands an unusual construction.—The Christian is here viewed as “sealed in Christ;” that is, as receiving a Divine attestation of his union with his Lord.
“On believing”:—better than “after believing,” because the Gr. does not emphasize sequence.
It rather combines into one idea the facts of the faith and the seal. In experience, the latter might markedly follow the former; but not necessarily in the Divine ideal.
sealed] So again Eph_4:30; and cp. 2Co_1:22. The idea of the phrase is a double one; attestation of reality (cp. Joh_3:33; Rom_4:11; 1Co_9:2), and claim of property (cp. Rom_15:28). “The Spirit” was at once the proof of the presence of Divine faith in the recipient, and the mark of Divine ownership over him.
Ye were sealed with that holy Spirit; ye were secured and ascertained of your right to the inheritance; which we may understand to be done either by the Spirit’s impressing upon the soul the image of God in the work of regeneration, or (because that cannot so well be understood to be after believing) rather by his testimony in men’s own consciences afterward; whether immediate, by an overpowering light shining into the soul, and filling it with assurance of its interest in Christ and heaven; or mediate, enabling a man to discern that image of God in his soul, by which the Spirit bears witness to his interest in the inheritance, and assures him of it: see Eph_4:30 Rom_8:16 Gal_4:6.
Of promise; because the Spirit’s coming was before promised, or because he verifies and confirms the promises in and to the hearts of believers.
Part of Speech: Verb
Tense: Aorist <<sealed
Voice: Passive <<
Mood: Indicative <<
Person: second [you+]
Number: Plural
No way, once sealed, to be unsealed later on.
J.