"The material world is compared to davanala, a forest fire. As we have experienced, no one goes to the forest to set a fire, but still it takes place. Similarly, no one within this material world wants to be unhappy. Everyone is trying to be very happy, but one is forced to accept unhappiness. In this material world, from time immemorial to the present moment, there have been occasional wars, world wars, even though people have devised various means to stop wars. When I was a young man there was the League of Nations. In 1920, after the First World War, different nations formed the League of Nations, just to arrange for peaceful living among themselves. No one wanted war, but again there was a forest fire -- the Second World War. Now they have devised the United Nations, but war is still going on -- the Vietnam War, the Pakistan War, and many others. So you may try your best to live very peacefully, but nature will not allow you. There must be war. And this warlike feeling is always going on, not only between nation and nation, but also between man and man, neighbor and neighbor -- even between husband and wife and father and son. This warlike feeling is going on. This is called davanala, a forest fire. No one goes to the forest to set fire, but automatically, by the friction of dried bamboo, sparks arise, and the forest catches fire. Similarly, although we do not want unhappiness, by our dealings we create enemies, and there is fighting and war. This is called samsara-davanala.
"This forest fire of material existence goes on perpetually, and the authorized person who can deliver you from this fire is called guru, the spiritual master.
"How does he deliver you? What is his means? Consider the same example. When there is a fire in the forest, you cannot send a fire brigade or go there yourself with bucketfuls of water to extinguish it. That is not possible. Then how will it be extinguished? You need water to extinguish fire, but where will the water come from -- from your bucket or your fire brigade? No, it must come from the sky. Only when there are torrents of rain from the sky will the blazing forest fire be extinguished. These rains from the sky do not depend on your scientific propaganda or manipulation. They depend on the mercy of the Supreme Lord. So the spiritual master is compared to a cloud. Just as there are torrents of rain from a cloud, so the spiritual master brings mercy from the Supreme Personality of Godhead. A cloud takes water from the sea. It doesn’t have its own water but takes water from the sea. Similarly, the spiritual master brings mercy from the Supreme Personality of Godhead. Just see the comparison. He has no mercy of his own, but he carries the mercy of the Supreme Personality of Godhead. That is the qualification of the spiritual master."
(The Journey of Self-Discovery, Chapter 4)