1. Be strong in the Lord (10-20)
The Christian life is like a battleground. So, we Christians must be spiritually strong in the Lord. Paul commands us to put on the full armor of God to take our stand against the devil. There are seven pieces of the armor of God. The first five are defensive: 1) the belt of truth that protects us from the devil's lie; 2) the breastplate of righteousness, from Satan's condemnation; 3) the sandals with the gospel of peace, from worries; 4) the shield of faith, from arrows of unbelief; 5) the helmet of salvation, from doubt about salvation. The last two are our offensive weapons: 6) the sword of God's word to defeat the devil; 7) prayer to fight with God's spirit. We must also pray for others to share the gospel fearlessly.
2. I am sending him to you (21-24)
Paul was sending Tychicus with the letter to the Ephesian believers to share about Paul's ministry to encourage them. We are not fighting alone. There are other believers in the spiritual battle. By sharing God's work and praying for them, together we can stand firm in the Lord.
Application: Lord, help us to fight against the devil by putting on the full armor of God.
One Word: Stand our ground