Revelation 3:7-8

“Write this to the angel of the church in Philadelphia: “This is what the One who is holy and true, who holds the key of David, says. When he opens a door, no one can close it. And when he closes it, no one can open it. I know what you do. I have put an open door before you, which no one can close. I know you have little strength, but you have obeyed my teaching and were not afraid to speak my name.