Just to add a little more context let's see what the verses prior to the ones in question say:
1 But of the times and the seasons, brethren, ye have no need that I write unto you.
2 For yourselves know perfectly that the day of the Lord so cometh as a thief in the night.
3 For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape.
4 But ye, brethren, are not in darkness, that that day should overtake you as a thief.
5 Ye are all the children of light, and the children of the day: we are not of the night, nor of darkness.
6 Therefore let us not sleep, as do others; but let us watch and be sober.
7 For they that sleep sleep in the night; and they that be drunken are drunken in the night.
8 But let us, who are of the day, be sober, putting on the breastplate of faith and love; and for an helmet, the hope of salvation.
9 For God hath not appointed us to wrath, but to obtain salvation by our Lord Jesus Christ,
10 Who died for us, that, whether we wake or sleep, we should live together with him.
11 Wherefore comfort [SIZE=-1]
F12[/SIZE] yourselves together, and edify one another, even as also ye do.
12 And we beseech you, brethren, to know them which labour among you, and are over you in the Lord, and admonish you;
13 And to esteem them very highly in love for their work's sake. And be at peace among yourselves.
14 Now we exhort [SIZE=-1]
F13[/SIZE] you, brethren, warn them that are unruly, comfort the feebleminded, support the weak, be patient toward all men.
15 See that none render evil for evil unto any man; but ever follow that which is good, both among yourselves, and to all men.
16 Rejoice evermore.
17 Pray without ceasing.
18 In every thing give thanks: for this is the will of God in Christ Jesus concerning you.
19 Quench not the Spirit.
20 Despise not prophesyings.
21 Prove all things; hold fast that which is good.
22 Abstain from all appearance of evil.
God will do it for these brothers because Paul tells them they are doing everything according to Scripture at this point. And He will do it for anyone else that obeys according to the Scripture.
But let's just look at one example here in this passage as that will be enough. Do you honestly think that God is going to perform this action on anyone that quenches the Holy Spirit?
Now you are left only two options. You can say no and this act of God is based upon some conditions. Or you can say that no eternally saved person can quench the Holy Spirit, which is kind of a foolish thing to say when Paul commands saved people not to do it.
Again when you let Scripture speak for itself there is only one option available. Truth!