for this cause, brothers, we were comforted over you in all our distress and affliction through your faith.
See with verse 8. Paul wrote 1 & 2 Thess (1 Thessalonians 5:27). These verse indicate that God’s Word is the tool for establishing young Christians in the faith. Note the way that Jesus used God’s Word in Matthew 4:1-11. God’s Word is the offensive weapon, the Sword, Ephesians 6:17.