"Tib.; lit. 'firm mind'; in Vajrayana Buddhism， a term for a personal deity， whose nature corresponds to the individual psychological makeup of the practitioner. Yidams are manifestations of the sambhogakaya （see Three Bodies of the Buddha） and are visualized in meditative practice. They can take on either a peaceful or wrathful form and each belongs to a particular Buddha family， Among the most widely invoked yidams are Chenresi and Green Tara （both are manifestations of Avalokitesvara）. Other Yidams appear only in strictly secret teachings."