Because humans have free will, angels cannot do their work without your co-operation.
Humans are the intermediaries through which angels channel their energy on Earth.
As you offer to work with them, they come close to you, waiting for you to direct them. As soon as you ask the angels to assist a person or situation, your thoughts and words create the bridges which allow them to reach in and help. Without your intercession they could not do so. Miracles are possible When several people together invoke the angels to touch and raise a situation, the angelic force is enormous and miracles become possible. Together, humans and angels have the power to change the world.