Prakasha has it’s roots in tantric yoga. Meaning the light of consciousness, it is the Divine itself. It is the basis for all that is ‘real’. Vimarsha, is that which manifests from the light.
Everything in our reality is a manifestation, a reflection of this light and so is part of the Divine. Vimarsha allows the light to examine itself. The light of consciousness, or God, is reflected as a myriad of unique forms, some of which have the ability to self-reflect. Humans are one of the manifestations with this ability.
Think of the ocean, with its many waves. Some are huge waves, others mere ripples. They are different, but still the ocean. We are like that; we are all individual representations of the divine, but still the divine. Through the practices of meditation, quieting the mind and the breath and letting go of attachment to our sensory world, we are able to touch this light of consciousness; we are able to self-reflect. We are able to recognize ourselves as part of the light and recognize that others are also manifestations of this same light. If you think of the light as being a mirror, you can see that the reflection (us) cannot exist without it. It is through self-reflection and by becoming aware of how the divine expresses itself through us that we find our purpose in life.