3:6 `He who has an ear, let him hear what the Spirit says to the churches.'

He who has an ear, let him HEAR what the SPIRIT says to the churches.

Again the general exhortation comes at the end. This time it may have had added significance. Since Sardis seemed to be surrounded by the death theme, hearing and believing the Word of God (John 5:24-29) is the way to pass from death unto life!