Most people believe the world as we know it will always stay the same as long as our sense organs do not change accidentally over the course of life. This is why the present world appears real, stable, but also impure to us.
But in fact, this is not so. Let’s first put aside the argument whether the world exists or not. Even if it exists, the world cannot affect us in any way if our five sense organs do not interact with it; it is the same as if it does not exist. For example, if our ear consciousness stops perceiving sound waves, then it does not matter, objectively speaking, whether sound waves exist or not. If they are perceived, sound in the impure state is a phenomenon of our mind; in the pure state, sound is transformed into the words of the buddha. After the generation stage practice is accomplished, this so-called unchanging world will be completely inverted. All impure phenomena will no longer exist; instead, the mandala of the buddhas will appear before the practitioner. The process of an ordinary person attaining buddhahood is in fact the process of transforming consciousness into wisdom.
~Depicted from GATEWAY TO VAJRAYANA PATH - The Generation Stage