It is said in the beginning of Srimad-Bhagavatam, tejo-vari-mrdam yatha vinimayah: this material world is conducted by fire, water and earth, which combine and take shape. Here it is mentioned that the three modes of nature (prthag gunan) act under the direction of different demigods. For example, King Indra is in charge of pouring water, the demigod Vayu controls the air and dries up the water, whereas the demigod controlling fire burns everything. Hiranyakasipu, however, by dint of his austere performance of mystic yoga, became so powerful that he alone took charge of everything, without assistance from the demigods.