Representations of the deity, such as statues ("murti"), paintings ("thangka"), or mandala, are often employed as an aid to visualization, in Deity yoga. The use of visual aids, particularly microcosmic/macrocosmic diagrams, known as "mandalas", is another unique feature of Buddhist Tantra. Mandalas are symbolic depictions of the sacred space of the awakened Buddhas and Bodhisattvas as well as of the inner workings of the human person. The macrocosmic symbolism of the mandala then, also represents the forces of the human body. The explanatory tantra of the "Guhyasamaja tantra", the "Vajramala", states: "The body becomes a palace, the hallowed basis of all the Buddhas."