The bell (Skt. ghaṇṭa; Tib. དྲིལ་བུ་, drilbu; Wyl. dril bu) is, with its necessary counterpart the vajra, an important ritual implement in Vajrayana practices. It symbolizes the feminine principle, the wisdom of emptiness, while the vajra symbolizes the masculine principle, that of compassion and skilful means. And the union of wisdom and skilful means is the enlightened mind.