We engage in generation stage practice because of our deep-seated attachment to the idea that our world has true, inherent existence. We believe that all the phenomena of this world, and the elements that comprise them, exist just as we perceive them, and we have ordinary attachment to them. We don't recognize their true nature because we are attached to our ordinary concepts of what things appear to be. We don't recognize that the five elements are the five consorts and that our own nature is the deity. We don't see our dwelling place as the celestial palace and our environment as the pure land and all the living beings as male and female deities. We are very attached to our belief that this world and the beings inhabiting it have actual, true, permanent existence.