What is the origin of the idiom "open doors to something" and when to use it?

The origin of the idiom "open door to something" is not entirely clear, but it likely comes from the literal meaning of an open door. An open door provides a passage, an entrance or an exit that allows someone to move forward or to enter a new space. Over time, the phrase has taken on a broader meaning and is now used to describe any situation where an opportunity or possibility is made available to someone.