You take your birth once in some form of body. You live for some time. Then you have to give up this body. Then you have to accept another body. Then again live for some time. Then give up that body. Again accept another body. In this way, it is going on. That is called saṁsāra, rotating within this material world.
That is compared with dāvāna. Dāvāna means forest fire. Forest fire, you have got experience. You have seen, might have. In the forest, nobody goes to set fire, but it takes place. Everyone knows it. Similarly, within this material world, nobody wants to be unhappy. Everyone is trying to be very happy, but he is forced to accept unhappiness. This is the position. Therefore it is called dāvāna. Dāvāna means nobody willingly sets fire, but there is fire in the forest.
Similarly, in this material world, everyone is trying from time immemorial—even at the present moment—there is some occasional war, world war, and they manufacture some means. In our days, when we were young men, there was a League of Nation. Perhaps some of you may know. When the 1900, 19 . . . when the First World War was finished, these nations, they formed a League of Nation. League of Nation means just to arrange for peaceful living between the nations. So there was forest fire again. Nobody wanted war, but there was Second World War. Again. And again they are trying to, the League . . . what is that? United Nations. But the war is going on. The Vietnam War is going on, the Pakistan War is going on, and many others are going on.