Paul asks them that they pray that the word of the Lord may run quickly and be glorified, and that there may be deliverance from the wicked who do not have faith. The Lord will guard you from the evil one.
2 Thessalonians 3:3 But the Lord is faithful, and He will strengthen you and protect you from the evil one.He is confident that the Thessalonians will continue to obey apostolic teachings. He prays that the Lord would direct their hearts into God's love and Christ's perseverance.
Taking on an authoritative tone, he confronts a persistent problem within the church.
First, he wants the church to keep away from those who are 'idle'. These people are best understood to be disruptive, busy doing the wrong kind of work, and rebellious.
Paul wants them to follow the example of the apostles. They were not idle, and did not drain the community. As leaders, they worked day and night laboring and toiling so that they would not be a burden to any Thessalonians. They did so, in order to offer themselves as a model to imitate.
2 Thessalonians 3:10 For even when we were with you, we gave you this rule: “The one who is unwilling to work shall not eat.”Responsibility and privilege goes together. Some in the Thessalonian community are busy doing selfish and disruptive things which damage the community. Paul urges such members to earn the bread.
2 Thessalonians 3:12 Such people we command and urge in the Lord Jesus Christ to settle down and earn the food they eat.Paul spells out a harsh consequence in store for those who reject his teachings mentioned in his letter. He urges Thessalonians not to not keep company with such individuals and admonish them as brothers.
In closing, Paul leaves a distinguishing mark of authenticity by writing the final greeting with his own hand. The grace of our Lord Jesus Christ be with you all.