Since the Reformation, Paul’s theology of the cross has been paramount. Since the early twentieth century, however, NT scholars have emphasized eschatology (to varying degrees “realized,” or not). 

Paul’s thought seems best encapsulated by understanding the two messianic comings as accomplishing disparate ends—Christ’s crucifixion sacrificially unto Christ’s Parousia gloriously, attaining the Jewish apocalyptic hope of eternal life (cf. Rom. 5:9; 1 Cor. 11:26; Phil. 3:11). Thus, Paul is not saying one main thing in his letters, but rather two main things. - John P. Harrigan

If I forget you, O Jerusalem, May my right hand forget her skill. May my tongue cling to the roof of my mouth If I do not remember you, If I do not exalt Jerusalem Above my chief joy.  

Psalm 137:5-6

The more that we lose the Fear of the Lord, the more that we drift away from the narrow path that leads to life, and drift toward the broad road that leads to eternal destruction. Beloved, acquire a fresh sense of the Fear of the Lord, because the time is short. -Joel Richardson

A single day in hell will be worse than a whole life spent in carrying the cross. - JC Ryle

Jesus will fulfill his Davidic and apocalyptic duties when he comes back to this world. The parousia will be marked not exclusively by the final judgement but also the renewal of Israel and the entire planet. - Isaac Oliver

The longer and the more I ponder the gospel of Christ the simpler [not easy] Christianity becomes and the more I see how much we've complicated it. (2 Cor. 11:2-3; 1 Cor. 2:2; Mt. 7:13-14, 28:38-40; Gal. 6:14; Jn 13:34-35; 1 Pet. 2:21-25, 4:7-11, etc) - Stuart Greaves

Do not try to make the gospel tasteful to carnal minds. Do not hide the offense of the cross, lest you make it of no effect. - Spurgeon

We fall from grace not only through licentiousness (Jude:4) but also through legalism (Gal 5:4) - Stuart Greaves

Our desire for God is God's gift to us. Our desire for God is an expression of His desire for us. -Mike Bickle

The God of Israel still seeks to ultimately glorify himself on the last day when he will restore creation by means of his Messiah through the judgement, resurrection, and kingdom. Jesus of Nazareth is indeed this Messiah, and for now it seems that Israel’s God is choosing to extend mercy through him to the Gentiles. - John P. Harrigan

As seen throughout Paul’s letters, the day of YHWH is associated with the judgment of the wicked, the resurrection of the dead, and the coming kingdom of the Messiah. Rather than redefining common Jewish apocalyptic expectations, it seems that Paul was primarily concerned  with pastoral needs and faithful discipleship in light of such expectations. 

The Jewish apocalyptic hope is the presumed goal in which all discipleship finds completion (cf. Rom. 2:5; 1 Cor. 1:8; 2 Cor. 1:14; Phil. 1:6; etc.). - John P. Harrigan

“Paul, as others before him, refers this honorific Christos to Jesus. In texts roughly contemporary with his letters, Christos most commonly stands for an End-time Davidic warrior and ruler. Traditions visible both in Paul’s letters and in the later gospels also present Jesus as such a redemptive End-time figure: returning with angels, coming on clouds of glory to gather his elect, bringing in the Kingdom with power”  - Paula Fredriksen

"Apart from the second Advent of our Lord, the world is more likely to sink into a pandemonium than to rise into a millennium." – Spurgeon 

When asked "who is the neighbor that I should love?" [Implication: "You don't mean ANYONE, do you?"] --Jesus gave an example of a man not just showing sentiment but risking his life--not for someone like him but someone of a hated race and religion. In short, "Yes, I mean anyone" - Tim Keller

Perhaps nowhere else (1 Corinthians 15) is Paul so binary in his description of the messianic kingdom, a plain fact which modern commentators surreptitiously avoid. Modern inaugurated eschatology presupposes that flesh and blood does indeed inherit the (partially realized) kingdom of God. Of course, modern realized eschatology and first-century realized eschatology are different (they have different eschatological reference points), but they do similarly presume that mortality can inherit the kingdom of God before the Parousia. 

Paul’s response to both would be the same: “flesh and blood cannot inherit the kingdom of God.”  -John P. Harrigan

Mocking the city Jesus wept over seems unwise. - Joshua Reese

When God at long last appears in resplendent majesty, when the heavens open wide with cleansing fire and warring hosts, then will creation be restored to its primal paradisal glory—on earth as it is in heaven, in the end as it was in the beginning. -John P. Harrigan

Watching the USA collapse financially, morally, and spiritually only reinforces the growing Maranatha cry.

To the struggling remnant: Stay faithful; the night will soon end, the Sun of Righteousness will rise and we’ll all skip around like baby goats in joyful celebration. - Joel Richardson

My teaching on an introduction to the gospel of Luke. Notes. Audio 1. Audio 2. 

Although not as numerous as Jesus’ references in the Gospels, Paul does speak often of the messianic kingdom in his letters (cf. Rom. 14:17; 1 Cor. 4:20; 6:9, 10; 15:24, 50; Gal. 5:21; Eph. 5:5; Col. 1:13; 4:11; 1 Thess. 2:12; 2 Thess. 1:5; 2 Tim. 4:1, 18). Like the resurrection of the dead, Paul’s references to the kingdom are generally without definition, utilized for the sake of exhortation (both positive and negative). Moreover, his references to the messianic kingdom are generally synonymous with the resurrection and day of judgment, thus falling in line with the Jewish apocalyptic narrative of history. -John P. Harrigan

Paul’s apocalyptic conviction was not initiated by his conversion to Christ but formed the background of his Pharisaic world view. . . . The apocalyptic structure of his thought remains the constant in his Pharisaic and Christian life. The truth of this assertion is evident from the Pauline letters, because apocalyptic persists from the earliest letter (1 Thessalonians) to the latest (Philippians). Apocalyptic is not a peripheral curiosity for Paul but the central climate and focus of his thought, as it was for most early Christian thinkers- Beker  

In Paul, hope has an apocalyptic specificity. It centers on a happening in time and space that is the object of the yearning and sighing of the Christian, that is, the victory over evil and death in the Parousia of Christ or the kingdom of God - Beker  

My teaching on growing in the knowledge of Jesus: notes, audio 1, audio 2

The Bible doesn’t speak of a kingdom entering people as if it was a mystical, ethereal, and private thing, but speaks of people entering the kingdom because it is an actual place with time-space dimensions and will be headquartered in a geographical place on this earth during the renewal. -Adam Welch

When God wants to judge a nation, He gives them wicked rulers. - John Calvin 

“Humble yourselves under the mighty hand of God so that at the proper time he may exalt you, casting all your anxieties on him, because he cares for you.” 1 Peter 5:6–7

The humble who exalt his mighty hand: He cares for them now.

He exalts them later.

-John Piper

"Reading doth furnish with matter; it is the oil that feeds the lamp of meditation. Be sure your meditations are founded upon Scripture. Reading without meditation is unfruitful; meditation without reading is dangerous." -Thomas Watson 

You say, ‘I want to walk nearer to God than anybody else,’ then you’ll carry a bigger cross than anybody else, you'll have a greater vision than anybody else, know more brokenness than anybody else — and this is the hardest of all — you’ll know more LONELINESS than anybody else. - Leonard Ravenhill

The resurrection of the body is necessary for entrance into the kingdom of God. -John P. Harrigan

“The present epistle (1 Thess) discloses that the Lord’s coming has been in the forefront of Paul’s thinking. Whatever the subject he touches on here—be it the greeting of the community (1:2–3), their acceptance of the faith (1:9–10), his hope concerning their ultimate salvation (2:19–20), his own behavior toward them (2:9–12), or his prayers on their behalf (3:11–13; 5:23–24)—his referent is the Parousia of Christ” - Plevnik  

Paul’s many references to the eschatological judgment generally fall in line with common Jewish apocalyptic expectations. The judgment is directly associated with the day of the Lord and the punishment of the wicked. Moreover, Jesus’s messianic identity and Parousia are understood within this eschatological framework. The fact that Paul generally makes passing references to the eschatological judgment (e.g., “the judgment seat” in Rom. 14:10 and 2 Cor. 5:10) without definition or explanation reinforces the supposition that he simply takes for granted the Jewish apocalyptic narrative in his writings.  -John P. Harrigan