Paul (Saul) was a Jew who was well on his way up in Judaism (Acts 9:1-2, 26:4-5, 10-11 Gal 1:13-14, Phil 3:4-6). So he knew his scripture (O.T.) and as he writes his epistles, the Holy Spirit brings these things to mind and reveals the hidden truths for the believers in Christ. Sometimes he quotes directly and other times allude to the ideas.
1:10 And to wait for his Son from heaven, whom he raised from the dead, even Jesus, which delivered us from the wrath to come. (Tribulation) Zechariah 12:9 And it shall come to pass in that day, that I will seek to destroy all the nations that come against Jerusalem. Zechariah 13:9 And I will bring the third part through the fire, and will refine them as silver is refined, and will try them as gold is tried: they shall call on my name, and I will hear them: I will say, It is my people: and they shall say, The Lord is my God.
Isaiah 26:20-21 …: hide thyself as it were for a little moment, until the indignation be overpast. For, behold, the Lord cometh out of his place to punish the inhabitants of the earth for their iniquity: …
3:13 To the end he may stablish your hearts unblameable in holiness before God, even our Father, at the coming of our Lord Jesus Christ with all his saints. Zechariah 14:5 …yea, ye shall flee, like as ye fled from before the earthquake in the days of Uzziah king of Judah: and the Lord my God shall come, and all the saints with thee.
4:4-5 That every one of you should know how to possess his vessel in sanctification and honour; Not in the lust of concupiscence, even as the Gentiles which know not God: Ester 2:12 Now when every maid’s turn was come to go in to king Ahasuerus, after that she had been twelve months, according to the manner of the women, (for so were the days of their purifications accomplished, to wit, six months with oil of myrrh, and six months with sweet odours, and with other things for the purifying of the women😉
4:7 For God hath not called us unto uncleanness, but unto holiness. Leviticus 11:44 For I am the Lord your God: ye shall therefore sanctify yourselves, and ye shall be holy; for I am holy: neither shall ye defile yourselves with any manner of creeping thing that creepeth upon the earth.
4:14 For if we believe that Jesus died and rose again, even so them also which sleep in Jesus will God bring with him. Job 19:25 For I know that my redeemer liveth, and that he shall stand at the latter day upon the earth:
5:3 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. Ezekiel 13:10 Because, even because they have seduced my people, saying, Peace; and there was no peace; and one built up a wall, and, lo, others daubed it with untempered morter:
5:8 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. Isaiah 59:17 For he put on righteousness as a breastplate, and an helmet of salvation upon his head; and he put on the garments of vengeance for clothing, and was clad with zeal as a cloak.
5:15 See that none render evil for evil unto any man; but …. Proverbs 20:22 Say not thou, I will recompense evil; but wait on the Lord, and he shall save thee. Proverbs 24:29 Say not, I will do so to him as he hath done to me: I will render to the man according to his work.
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