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;
When Paul writes the first letter to the Thessalonians, he expresses his desire to see them that he "might perfect that which is lacking in (their) faith" (1 Thessalonians 3:10); and now, in this second letter, he thanks God because their "faith groweth exceedingly."