The Good Shepherd in the Book of Revelation

In the book of Revelation, jesus is spoken of as the shepherd who rules with a rod of iron. In Acts 20, paul says to the elders in ephesus: pay careful attention to yourselves and to all the flock which the holy spirit has made you overseers to for the church of god. The lamb wil shepherd; he will guide his people to springs of living water. And so feeding and pasturing here are almost synonymous.