'Opens' in the Bible

"To the angel of the assembly in Philadelphia write: "He who is holy, he who is true, he who has the key of David, he who opens and no one can shut, and who shuts and no one opens, says these things:

Behold, I stand at the door and knock. If anyone hears my voice and opens the door, then I will come in to him, and will dine with him, and he with me.

One of the elders said to me, "Don't weep. Behold, the Lion who is of the tribe of Judah, the Root of David, has overcome; he who opens the book and its seven seals."