29:4.14

The physical controllers are chiefly occupied in the adjustment of basic energies undiscovered on Urantia. These unknown energies are very essential to the interplanetary system of transport and to certain techniques of communication. When we lay lines of energy for the purpose of conveying sound equivalents or of extending vision, these undiscovered forms of energy are utilized by the living physical controllers and their associates. These same energies are also, on occasion, used by the midway creatures in their routine work.