This is what John gazed upon in awe and wonder. The elders, consecrated before God, representative of the whole Church, robed in the white garments of righteousness, and crowned with the glory of eternal life, having been sealed by the Holy Spirit.
Spiritually, the assembly in Sardis was like a slumbering city even as invading armies (of sin, perhaps) were gathering outside the walls.
The spirit of the Lord shall rest on him, the spirit of wisdom and understanding, the spirit of counsel and might, the spirit of knowledge and the fear of the Lord.
Seven represents all that is—the sum of the physical cosmos (the number four) and the spiritual realm (the number three). This was not unique to Judaism, but was also well-established in the Greco-Roman world.