My take on Phil 1:6

My take on THIS is that what Paul says is that he is confident that God will work "among" them (the most obvious reading of the EN+plural construction); But he was mistaken, because they forfeited participation in it (as did all of the assemblies in Asia that Revelation was given to) and their assembly no longer exists. Paul's confidence is primarily an expression of confidence that God is going to "be with you until the end of the age" but that is, of course, predicated on their continued obedience.

I think a similar "qualified vote of confidence" is seen in Hebrews:

Hebrews 6:
4 For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,
5 And have tasted the good word of God, and the powers of the world to come,
6 If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.
7 For the earth which drinketh in the rain that cometh oft upon it, and bringeth forth herbs meet for them by whom it is dressed, receiveth blessing from God:
8 But that which beareth thorns and briers is rejected, and is nigh unto cursing; whose end is to be burned.
9 ¶ But, beloved, we are persuaded better things of you, and things that accompany salvation, though we thus speak.
10 For God is not unrighteous to forget your work and labour of love, which ye have shewed toward his name, in that ye have ministered to the saints, and do minister.
11 And we desire that every one of you do shew the same diligence to the full assurance of hope unto the end:
12 That ye be not slothful, but followers of them who through faith and patience inherit the promises.

Those who "claim" Phil 1:6 as assurance that no matter whether they are faithful or not, God will ignore it and "make it happen anyway" are surely being presumptuous, rather than exercising "faith."

James 1:
2 ¶ My brethren, count it all joy when ye fall into divers temptations;
3 Knowing this, that the trying of your faith worketh patience.
4 But let patience have her perfect work, that ye may be perfect and entire, wanting nothing.
5 If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him.
6 But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.
7 For let not that man think that he shall receive any thing of the Lord.
8 A double minded man is unstable in all his ways.
9 Let the brother of low degree rejoice in that he is exalted:
10 But the rich, in that he is made low: because as the flower of the grass he shall pass away.
11 For the sun is no sooner risen with a burning heat, but it withereth the grass, and the flower thereof falleth, and the grace of the fashion of it perisheth: so also shall the rich man fade away in his ways.
12 Blessed is the man that endureth temptation: for when he is tried, he shall receive the crown of life, which the Lord hath promised to them that love him.
13 ¶ Let no man say when he is tempted, I am tempted of God: for God cannot be tempted with evil, neither tempteth he any man:
14 But every man is tempted, when he is drawn away of his own lust, and enticed.
15 Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death.
16 Do not err, my beloved brethren.