Three Reasons Demons Are Afraid Of The Universal Form

“When Arjuna saw the universal form of the Lord, the demigods took pleasure in it, but others, who were demons and atheists, could not stand it when the Lord was praised. Out of their natural fear of the devastating form of the Supreme Personality of Godhead, they fled. Krishna’s treatment of the devotees and the atheists is praised by Arjuna.” (Shrila Prabhupada, Bhagavad-gita, 11.36 Purport)