Female bodhisattva, or set of bodhisattvas, in Tibetan Buddhism. Vajrayana Buddhism often specifies the number of feet of a buddha or bodhisattva. Over time, Mahayana Buddhists developed mature systematized doctrines about the bodhisattva path. Guanyin is the Buddhist bodhisattva associated with compassion. Statuary effigies were previously exclusively used for Buddhist bodhisattva and Taoist gods. Most nuns participated in religious practices with devotions to many different bodhisattva and Buddha. This can be a Buddha, a "bodhisattva" or a deity. Some Buddhist charms are pendants dedicated to the Bodhisattva Guanyin. Buddha and dispute the contentions of other sects that view him as a bodhisattva. Two side walls also have Buddha images flanked by Bodhisattva. These are important features of the mind of a bodhisattva, called bodhicitta. Their teachings center on the bodhisattva path (viz. Art works featuring depictions of Avalokitesvara, the Bodhisattva of Mercy and Compassion, became increasing popular. These are the practices of a Bodhisattva. Tulkus lead responsible lives because of their status as a bodhisattva.