To Ephesus He is the one who holds the Seven stars in His hand, and who walks among the seven Candlesticks, showing both his knowledge of their lack of love and also His ability to remove the candlestick unless they repent.
To Pergamos, He is the one who has the sharp two-edged sword. This is the word of God, which can divide between the truth and the errors that were found in Pergamos. It also is the sword which He promises to bring against those who continue in their errors (Rev. 2:16).
To Thyatira, which had a firmly rooted problem of immorality and false doctrine, He is the one with eyes of flaming fire and feet like bronze. His eyes search the hearts of that Church and none can hide.
To Sardis He is the one who has the Seven Spirits of God and the seven stars. They need the Seven Spirits because they are alive only in name, and lack the true life of the Spirit.
To Philadelphia He is the one with the Key of David, who has power to open and shut irrevocably. He uses this power to open a door for this church.
I find it interesting that Christ’s self-revelation is linked to the need of His Church – truly He is all we need and we are complete in Him!