Whenever there is a burden created by the demons and whenever the innocent devotees are distressed by demoniac rulers, the Lord appears in due course of time to kill the demons with the assistance of His real representatives, who are technically called demigods. In the Upanisads it is stated that the demigods are different parts of the Supreme Personality of Godhead. As it is the duty of the parts of the body to serve the whole, it is the duty of Krsnas devotees to serve Krsna as He wants. Krsnas business is to kill the demons, and therefore this should be a devotees business also. Because the people of Kali-yuga are fallen, however, Sri Caitanya Mahaprabhu, out of kindness for them, did not bring any weapon to kill them. Rather, by spreading Krsna consciousness, love of Krsna, He wanted to kill their nefarious, demoniac activities. This is the purpose of the Krsna consciousness movement. Unless the demoniac activities on the surface of the world are diminished or vanquished, no one can be happy. The program for the conditioned soul is fully described in Bhagavad-gita, and one simply has to follow these instructions to become happy. Sri Caitanya Mahaprabhu has therefore prescribed:

Let people chant the Hare Krsna mantra constantly. Then their demoniac tendencies will be killed, and they will become first-class devotees, happy in this life and in the next.