The homa ritual grammar is common to many sanskara (rite of passage) ceremonies in various Hindu traditions. The Vedic fire ritual, at the core of various homa ritual variations in Hinduism, is a "bilaterally symmetrical" structure of a rite. It often combines fire and water, burnt offerings and soma, fire as masculine, earth and water as feminine, the fire vertical and reaching upwards, while the altar, offerings and liquids being horizontal. The homa ritual's altar (fire pit) is itself a symmetry, most often a square, a design principle that is also at the heart of temples and mandapas in Indian religions. The sequence of homa ritual events similarly, from beginning to end, are structured around the principles of symmetry. ).