Yadava Prakasa, who is believed to have lived during the 11 century CE, is the founder of the Bhedabheda system of philosophy. Bhedabheda is the difference with non-difference. The system of philosophy formulated by Yadava Prakasa differs substantially from that formulated by Bhaskara, who lived earlier, although that system is also called Bhedabheda. According to Yadava, in pralaya (deluge), the individual selves and non-sentient matter alike are potentially merged in Brahman, and remain undifferentiated, and creation is their appearing out of a part of the absolute Brahman. Yadava thinks that as a portion of a lump of clay is made into pots and jars, while the rest remains unchanged, Brahman evolves into God, individual selves and insentient matter, out of a portion of itself, while the other portion remains without change. He gives yet another example to illustrate the point, e.g., the ocean, which at some places takes the form of waves, foam and bubbles, but remains unchange