You quoted Philippians 2:
Therefore, my beloved, as you have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling;
Philippians 2:12
Your own statement is that "Saved is temporary, salvation is eternal". Here Paul says that you are supposed to work out your own "salvation". By your own definition that is eternal. In other words, what God is working in you if you are His (referenced in Philippians 2:13) is "eternal". "Eternal" means more than just never-ending, but for the purposes of your own definition I'm using it in your way.
So if what is in the believer is eternal, why do you use it to try and prove it to be temporary? The only logical (not scriptural) way I can see for you to do that is to isolate being saved from salvation. And if that's the case, then what is in the believer (per Philippians 2:12) can't be eternal - otherwise you couldn't lose it.
Which raises the initial point I was trying to make. From your recent post (emphasis mine) :
Your trust has to be in you - because God will not (according to your own words) provide eternal salvation to you otherwise. Your gospel is that we are saved eternally "...because we are trying...". In other words, the determining factor (because God has done all He can or will) is your own effort. Your works. Therefore, your eternal salvation depends on you. If your trust is in yourself, uncertainty will certainly predominate.
Not so the scriptures :
My sheep hear my voice, and I know them, and they follow me:
And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.
My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father's hand.
John 10:27-29
But we had the sentence of death in ourselves, that we should not trust in ourselves, but in God which raiseth the dead:
Who delivered us from so great a death, and doth deliver: in whom we trust that he will yet deliver us;
2 Corinthians 1:9-10
And such trust have we through Christ to God-ward:
Not that we are sufficient of ourselves to think any thing as of ourselves; but our sufficiency is of God;
2 Corinthians 3:4-5
Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;
Which he shed on us abundantly through Jesus Christ our Saviour;
That being justified by his grace, we should be made heirs according to the hope of eternal life.
Titus 3:5-7
Yea doubtless, and I count all things but loss for the excellency of the knowledge of Christ Jesus my Lord: for whom I have suffered the loss of all things, and do count them but dung, that I may win Christ,
And be found in him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith:
That I may know him, and the power of his resurrection, and the fellowship of his sufferings, being made conformable unto his death;
If by any means I might attain unto the resurrection of the dead.
Not as though I had already attained, either were already perfect: but I follow after, if that I may apprehend that for which also I am apprehended of Christ Jesus.
Brethren, I count not myself to have apprehended: but this one thing I do, forgetting those things which are behind, and reaching forth unto those things which are before,
I press toward the mark for the prize of the high calling of God in Christ Jesus.
Philippians 3:8-14
How can one who has known the goodness of Christ and the power of His resurrection think that anything he does is meritorious? How can the resurrection be anulled simply because we don't try? Ephesians 2 says we are saved unto good works. They are the evidence of faith - not the effort by which we get faith. We persevere because of His work in us - our salvation is evidence of His work, not ratified by ours.
after the commandments and doctrines of men?