“Wherefore when we could no longer forbear, we thought it good to be left at Athens alone; and sent Timotheus, our brother, and minister of God, and our fellowlabourer in the gospel of Christ, to establish you, and to comfort you concerning your faith: that no man should be moved by these afflictions: for yourselves know that we are appointed thereunto.” 1 Thessalonians 3:1-3 (KJV)
The word “Wherefore” (KJV) or “Therefore” (NKJV) means this carries on from chapter two – especially verses 19 and 20. Paul sharing with the Thessalonians how he could not wait to be with them, and find out how they were doing in their lives of faith.
I share with you the note from The MacArthur Study Bible on verse 2.
3:2 establish…encourage…your faith. This was a common ministry concern and practice of Paul (cf. Acts 14:22; 15:32; 1823). Paul’s concern did not focus on health, wealth, self-esteem, or ease of life, but rather the spiritual quality of life. Their faith was of supreme importance in Paul’s mind as evidenced by 5 mentions in vv. 1-10 (see also vv. 5, 6, 7, 10). Faith includes the foundation of the body of doctrine (cf. Jude 3) and their believing response to God in living out that truth (cf. Heb. 11:6). THE MACARTHUR STUDY BIBLE note on chapter 3 verse 2.