Imagine that you see a vapor on a mirror, but as you observe it, you notice that it is slowly vanishing away. At first, you might think of the vapor as a solid object with a clear form and identity. However, as it disappears, you realize that it is not a static, permanent object.
The vapor is dependent upon the environment, temperature, and humidity level, for its continued existence. It is also made up of various parts, such as water molecules, which are themselves constantly in motion and changing. If you were to examine the vapor more closely, you would find that there is no inherent self-nature or essence to it. It is simply a collection of parts and conditions that come together temporarily to form the vapor.
This realization can lead to a deeper understanding of the nature of reality and the concept of emptiness. By recognizing that all phenomena, including the vapor on the mirror and ourselves, are devoid of inherent existence and are dependent on various conditions, we can begin to let go of our attachment to the idea of a fixed, permanent self or identity. This can lead to a greater sense of freedom, compassion, and wisdom in our lives. The vanishing vapor on the mirror is a reminder that all things are impermanent and constantly changing.