Jesus holds the seven spirits of God, the seven stars, and the sevenfold spirit of God. He holds those in leadership in his hands, and he provides the sevenfold graces of the spirit.
Sardis was the capital of the Lydian kingdom, and a place tied to the early history of coinage. The temple of Artemis and the remains of the synagogue and the shops along the road are what the visit holds. The letter warns a church that has a name of being alive and is not. The archaeology is substantial. The sentence in the letter is short.