The Law of Manifestation.
There are actions, sounds, techniques, mental energy and symbols which when understood, will enable one to manifest first energy (love, more joy, peace, etc.) into one's aura, then with practice and increased love held in the heart and emotional body - physical objects. Thought is a force, even as electricity or gravitation. The human mind is a spark of the almighty consciousness of God. Whatever the powerful mind (holding a pure thought - that which excludes any other thought) believes very intensely will instantly come to pass.
The Law of Manifestation -- The spirit is manifested in the flesh. Only through this manifestation can one come to know oneself.