Whatever actions and reactions take place for the creation, maintenance and annihilation of this material world are actually brought about by the one Supreme Person. There are many varieties of philosophers trying to search for the ultimate cause under different names and forms, but they are unable to find the Supreme Personality of Godhead, Krsna, who explains in Bhagavad-gita that He is the origin of everything and the cause of all causes (aham sarvasya prabhavah). This inability is due to the illusory energy of the Supreme Lord. Devotees, therefore, accept the Supreme Personality of Godhead as He is and remain happy simply by chanting the glories of the Lord.