In the days when Jesus walked this earth, the rabbinic practice of setting down rules of what is and is not allowed was technically referred to as binding and loosing.
To "bind" something was to forbid it. To "loose" something was to allow it. (p. 49)---
Notice what Jesus says in the book of Matthew: "I will give you the keys of the kingdom of heaven; whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven."...
What he is doing here is significant. He is giving his followers the authority to make new interpretations of the Bible.
[He is also saying that when they do so,] somehow God in heaven will be involved.