Another important point of the parable [of the Burning House] is that we humans are allegorically illustrated as living in a burning house. The burning, of course, symbolizes our suffering. From the Buddhist viewpoint, suffering is an inescapable fact of life, as illustrated in the dictum, “All existence is suffering.” Many people think this view is too pessimistic, but that is not the case. The dictum is presented as a bare fact, neither good or bad. Biological suffering is a part of life. The question is, What can we do about it?
Introduction to the Lotus Sutra