I like how the Rotherhams reads in the following verses.
Phi 3:8 Yea, doubtless! and I account all things to be, loss, because of the excellency of the knowledge of Christ Jesus my Lord, for the sake of whom, the loss, of all things, have I suffered, and do account them refuse, in order that, Christ, I may win,
Phi 3:9 And be found in him—not having a righteousness of my own, that which is by law, but that which is through faith in Christ, the righteousness which is, of God, upon my faith,—
Phi 3:10 To get to know him, and the power of his resurrection and fellowship of his sufferings, becoming conformed unto his death,—
Phi 3:11 If by any means I may advance to the earlier resurrection, which is from among the dead:
Phi 3:12 Not that I have, already, received, or have, already, reached perfection, but I am pressing on—if I may even lay hold of that for which I have also been laid hold of by Christ Jesus:—
Phi 3:13 Brethren! I, as to myself, reckon that I have, not yet, laid hold; one thing, however,—the things behind, forgetting, and, unto the things before, eagerly reaching out,
Phi 3:14 With the goal in view, I press on for the prize of the upward calling of God in Christ Jesus.
Notice in verse 11 it reads "earlier resurrection"
It looks like at the time of his writing to the Phillipians, Paul was not sure yet of his election since "he that endures to the end shall be saved"
In 2Tim which is considered the last book Paul wrote he says this:
2Ti 4:6 For, I, already, am being poured out as a drink-offering, and, the season of my release, is at hand,—
2Ti 4:7 The noble contest, have I contested, the race, have I finished, the faith, have I kept:
2Ti 4:8 Henceforth, lieth by for me—the crown, of righteousness, which the Lord will render unto me in that, day,—The righteous judge,—Ye, not alone unto me, but unto all them also who have loved his forthshining.
Looks like he had assurance that since he finished his race well that he finally had assurance of his election.
Am I on the right track here?
Love in Christ,
Andy