Word: open in Revelation

I know thy works: behold, I have set before thee an open door, and no man can shut it: for thou hast a little strength, and hast kept my word, and hast not denied my name.

Revelation 3:20

Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me.

Revelation 5:2

And I saw a strong angel proclaiming with a loud voice, Who is worthy to open the book, and to loose the seals thereof?

Revelation 5:3

And no man in heaven, nor in earth, neither under the earth, was able to open the book, neither to look thereon.

Revelation 5:4

And I wept much, because no man was found worthy to open and to read the book, neither to look thereon.

Revelation 5:5

And one of the elders saith unto me, Weep not: behold, the Lion of the tribe of Juda, the Root of David, hath prevailed to open the book, and to loose the seven seals thereof.

Revelation 5:9

And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation;

Revelation 10:2

And he had in his hand a little book open: and he set his right foot upon the sea, and his left foot on the earth,

Revelation 10:8

And the voice which I heard from heaven spake unto me again, and said, Go and take the little book which is open in the hand of the angel which standeth upon the sea and upon the earth.