From Phonon_Belt @ Livejournal:

Rubedo (or “reddening”) is the final step for creating the philosopher’s stone in alchemy. In terms of spiritual/mental growth, though, it is the culmination of the process of self-realization and leads to the appearance of the Self archetype, which Jung apparently described as “the total, timeless man … who stands for the mutual integration of conscious and unconscious.” The process of rubedo has also been described as follows:

Once the inner light has been discovered, it must be made into the only reality in our consciousness. After having descended into the unconscious [in nigredo and albedo] … we found the Light. […] [O]ur conscious, or attention, must completely penetrate our unconscious, or soul, or everything that lies hidden in ourselves.

Perhaps that’s why this song is one big command to “see” or become conscious of something?