Apocalypse Revealed #165
165. "'You have a few names even in Sardis.'" (3:4) This symbolically means that they also have among them some people who do have life in their worship.
A few names means, symbolically, some who are of such a character as now described, for a name symbolizes someone's character. That is because everyone in the spiritual world is named in accordance with his character (no. 81). The character of the people described now is that they have life in their worship.
Matthew 22:11-13
11
But when the king came in to see the guests, he saw there a man who didn't have on wedding clothing,
12
and he said to him, 'Friend, how did you come in here not wearing wedding clothing?' He was speechless.
13
Then the king said to the servants, 'Bind him hand and foot, take him away, and throw him into the outer darkness; there is where the weeping and grinding of teeth will be.'