We are bound to always give thanks to God for you, brothers,{The word for "brothers" here and where context allows may also be correctly translated "brothers and sisters" or "siblings."} even as it is appropriate, because your faith grows exceedingly, and the love of each and every one of you towards one another abounds;
He is exceedingly thankful that the believers are patient during the persecutions and tribulations through which they have been passing (verse 4). Paul is also thankful that God will judge the enemies of the church in righteousness. It is a righteous thing with God to recompense tribulation to them who trouble His children, and for this assurance, Paul expresses thanksgiving (verses 5-10).