Some Buddhist traditions, especially those associated with Tantric Buddhism (also known as Vajrayana and Secret Mantra) use images and symbols of deities and Buddhas in meditation. This is generally done by mentally visualizing a Buddha image (or some other mental image, like a symbol, a mandala, a syllable, etc.), and using that image to cultivate calm and insight. One may also visualize and identify oneself with the imagined deity. While visualization practices have been particularly popular in Vajrayana, they may also found in Mahayana and Theravada traditions.