Revelation addresses Sardis as the fifth of the seven churches of Asia.
The message declares that the church possessed a reputation for life but was spiritually dead. Its members were commanded to wake up, strengthen what remained, remember what they had received, and repent.
The warning that Christ could come like a thief if the church did not remain watchful would have been especially vivid in a city whose supposedly secure acropolis had been captured unexpectedly during its history.
The message also recognizes a faithful remnant in Sardis whose members had not soiled their garments and promises that those who overcome would be clothed in white.