Hear What The Spirit Saith Unto The Churches

'Write the things which thou hast seen, and the things which are, and the things which shall be hereafter;
The mystery of the seven stars which thou sawest in my right hand, and the seven golden candlesticks. The seven stars are the angels of the seven churches: and the seven candlesticks which thou sawest are the seven churches.'
Revelation 1:19-20

'He that hath an ear, let him hear what the Spirit saith unto the churches.'
Revelation 3:22

What DOES the Spirit say unto the churches?