First, Kolo. As I stated before, God is not asking permission of anyone in that verse in Revelation 3. Second, there is a context to that verse. The context is the church of Laodicea. The verse preceding it reads"As many as I love, I rebuke and chasten: be zealous therefore, and repent." So again, you have Christ speaking to His church at Laodicea that was backslidden, lukewarm . They have cut off their fellowship with Christ because of being neither cold nor hot for him but lukewarm. He is telling them, if they repent that fellowship will be restored. Two verses later it reads" He that hath an ear, let him hear what the Spirit saith unto the churches."
The Audience is not the lost. The audience is the church. Christ is not asking permission. Christ is telling the church what will happen if they repent.
The verse is not one of evangelism, but of discipleship.
But His action depends on their action. IF they repent THEN he will come in and sup with them. It may not exactly be permission but it's not how a potter addresses His clay either, is it? What's the distinction?