“There will be tribulation and distress for every soul of man who does evil, of the Jew first and also to the Greek.”
Again, we have the contrast of the wicked vs the good. Essentially, a reward system in the day of judgement in which the soul of the wicked endures calamity and distress. One cannot even imagine on that great terrible day of judgement, when all those who have done wicked things are exposed and judged for what they have done. This passage is dealing especially with God’s judgement after death as Paul mentions “every soul”. There wont be any do overs, no reset button to undo a life of rebellion towards God. As judgement is exercised upon the wicked, they will only be able to face they’re due penalty. No one will be able to say anything against the judgement of God. After it has happened, there will be weeping and gnashing of teeth. The weeping will be those who so desperately want to be forgiven and be with God, they will weep because they regret not having faith in Jesus when they had the chance. They weep because they realize that it’s over, they’ve received their judgement and there is no second chance. There is no mercy, there is no hope, no hope for rest or peace from eternal tribulation. Those who gnash their teeth do so out of anger. They grind their teeth and seethe in consuming hatred towards God for banishing them from heaven and eternal peace. They hate God even more then they did on earth because now they are reaping what they have sown and they now reap eternal torment without the hope of escaping. They spend all eternity hating God for they hate Him for His holiness and mercy shown to the faithful and wrath towards the unfaithful.
It’s interesting that Paul says that this tribulation is for the Jew first, and also to the Greek (anyone that is not a Jew). The Jews historically and strongly believed in God’s justice and impartiality towards mankind. This judgement is reserved first for the Jew because the Jew is the chosen people of God, given the Law of Moses and the Prophets who laid down the foundation for the Messiah, and they rejected Him. They are condemned first because they have been given such a greater blessings over the rest of the world and yet so many of them rejected the very one they longed and waited for. This is also why the gospel was spread to the Jews first and then to the Gentiles. God in His mercy and love for the Jewish people wanted them to experience the first fruits of the Gospel and then the Gentile would experience it as well.