'Opened' in the Bible

When Daniel realized that a written decree had been issued, he entered his home, where the windows in his upper room opened toward Jerusalem. Three times daily he was kneeling and offering prayers and thanks to his God just as he had been accustomed to do previously.

A river of fire was streaming forth and proceeding from his presence. Many thousands were ministering to him; Many tens of thousands stood ready to serve him. The court convened and the books were opened.

Then one who appeared to be a human being was touching my lips. I opened my mouth and started to speak, saying to the one who was standing before me, "Sir, due to the vision, anxiety has gripped me and I have no strength.