It has been said that the human mind is the true final frontier. In that squishy gray matter between our ears originates every earthly idea, impulse, urge, desire and function, and there are those who argue the mind is capable of feats—ESP, clairvoyance, telekinesis—as yet unproven by medical science. Certain esoteric disciplines such as Theosophy teach that human thoughts exist in reality as surely as any tangible object, and remote Tibetan Buddhist practitioners have pushed the notion to its extreme with the manifestation of tulpas, three-dimensional corporeal entities conjured solely through concentration. Such thought-forms, it is believed, may initially act in accordance to their creator’s wishes, but can, and often do, develop their own willful, independent personalities.