God’s economy is God’s household administration, God’s working out of His plan. In this economy we receive grace. This grace gradually develops our spiritual vision, enabling us to realize God’s mystery all the way to New Jerusalem. This is Ephesians 1:7-12 and 3:8-11.
First Timothy 1:4 tells us that God’s economy is in faith. It is neither physical nor psychological but in the spiritual realm of faith. Hebrews 11:1 tells us that our faith makes the unseen things (including New Jerusalem) real to us.
In the New Testament faith and the Spirit are often coupled. For example:
• “a man full of faith and of the Holy Spirit” (Acts 6:5, 11:24)
• we “receive the Spirit…out of the hearing of faith” (Gal. 3:2, 5)
• we “receive the promise of the Spirit through faith” (Gal. 3:14)
• we build ourselves up “upon your most holy faith, praying in the Holy Spirit” (Jude 20)
We have a “spirit of faith” (2 Cor. 4:13) with which we speak the things of Christ Jesus, things which produce God’s economy (1 Tim. 1:3-4). This is what Paul did in announcing the unsearchable riches of Christ.
The announcing of the riches of Christ builds up His Body. This announcing is the outflow from Christ the Head, through all the members, which “causes the growth of the Body unto the building up of itself in love” (Eph. 4:16). Ultimately these unsearchable riches produce New Jerusalem and are displayed by New Jerusalem.