God our Father has created us in Christ Jesus to do good works and walk in them. Paul proclaims that gospel in to the saints in Ephesus. He illustrates it by commending the work of faith done by the Thessalonians.
Also you—being dead in the trespasses and the sins, in which once ye did walk according to the age of this world, according to the ruler of the authority of the air, of the spirit that is now working in the sons of disobedience, among whom also we all did walk once in the desires of our flesh, doing the wishes of the flesh and of the thoughts, and were by nature children of wrath—as also the others, and God, being rich in kindness, because of His great love with which He loved us, even being dead in the trespasses, did make us to live together with the Christ, (by grace ye are having been saved,) and did raise [us] up together, and did seat [us] together in the heavenly [places] in Christ Jesus, that He might show, in the ages that are coming, the exceeding riches of His grace in kindness toward us in Christ Jesus, for by grace ye are having been saved, through faith, and this not of you—of God the gift, not of works, that no one may boast; for of Him we are workmanship, created in Christ Jesus to good works, which God did before prepare, that in them we may walk.
Wherefore, remember, that ye [were] once the nations in the flesh, who are called Uncircumcision by that called Circumcision in the flesh made by hands, that ye were at that time apart from Christ, having been alienated from the commonwealth of Israel, and strangers to the covenants of the promise, having no hope, and without God, in the world; and now, in Christ Jesus, ye being once afar off became nigh in the blood of the Christ, for he is our peace, who did make both one, and the middle wall of the enclosure did break down, the enmity in his flesh, the law of the commands in ordinances having done away, that the two he might create in himself into one new man, making peace, and might reconcile both in one body to God through the cross, having slain the enmity in it, and having come, he did proclaim good news—peace to you—the far-off and the nigh, because through him we have the access—we both—in one Spirit unto the Father.
Then, therefore, ye are no more strangers and foreigners, but fellow-citizens of the saints, and of the household of God, being built upon the foundation of the apostles and prophets, Jesus Christ himself being chief corner-(stone), in whom all the building fitly framed together doth increase to an holy sanctuary in the Lord, in whom also ye are builded together, for a habitation of God in the Spirit.
2 Thessalonians 1
The work of faith and the good pleasure of goodness go hand in hand. Paul blesses the Thessalonians, thanks God for these brothers and sisters in the Lord, commends them for their faith in God increasing and their love for one another that abounds. He tells them, “As a result, we rejoice about you among God’s churches—about your endurance and faith through all the persecutions and afflictions you are experiencing” 2 Thessalonians 1:4 ISV
Then Paul a puts that in perspective of eternity for them and us. “This is a plain indication of God’s righteous judgment so that you will be considered worthy of the kingdom of God, for which indeed you are suffering. For after all it is only just for God to repay with affliction those who afflict you, and to give relief to you who are afflicted and to us as well when the Lord Jesus will be revealed from heaven with His mighty angels in flaming fire, dealing out retribution to those who do not know God and to those who do not obey the gospel of our Lord Jesus. These will pay the penalty of eternal destruction, away from the presence of the Lord and from the glory of His power, when He comes to be glorified in His saints on that day, and to be marveled at among all who have believed—for our testimony to you was believed. 2 Thessalonians 1:5-10 NASB
Paul’s prayer for them also applies to each of us. “for which also we do pray always for you, that our God may count you worthy of the calling, and may fulfil all the good pleasure of goodness, and the work of the faith in power, that the name of our Lord Jesus Christ may be glorified in you, and ye in him, according to the grace of our God and [the] Lord Jesus Christ 2 Thessalonians 1:11-12. Young’s Literal Translation.
To read the 173 verses on work, click this link.