The Physical Plane is the Realm of Physical Science, where physical laws govern physical existence.
It is where Spiritual Beings incarnate for the purpose of spiritual development & growth.
It is the physical dimension of Spirit.
It is where Spiritual Beings experience a physical experience called being physical.
There is no such thing as a purely physical being.
Being physical is a state of being that is a mental & an emotional experience.
The Planet Earth is a physical realm on which Spiritual Beings experience a physical reality of their own creation.
It is a particularly useful place to experience growth because in the physical plane thinking, unlike pure thought, is not instantly creative.
The physical plane is a creation of long held beliefs, convictions & experiences of several billion individual creative consciences that are limited only by their lack of creative power.
A consciousness that is disconnected from its Source of Spiritual Creative Power creates an experience of being a creation that is disconnected from its Spiritual Creator.