What does the aperture on the yogi's head represent?

Top light and white light are the stages of virtue achievement.

The round lamp on the top of Buddha, Bodhisattva or Lohan is also called dome lamp, dome lamp, backlight and backlight.

There is also a classification of head lamps as body lamps, and head lamps and body lamps are called rainbow lamps.

When the Bodhisattva becomes a Buddha, because "the evil root has been abandoned, there is no arrogance, life and death have been removed, the root has been broken, and it is no longer planted." What I have done is wisdom ",and" the supreme truth is the most correct feeling. " "The Buddha has eighteen methods, ten divine powers and four fearlessness." Since then, "the light shines for seven days, and the fragrance is not limited to sandalwood." (Prince Rui Ying Ben Qi Jing, Volume II)

The Buddha's achievements are "naturally brilliant, like the sun and the moon; There was a headlight between the eyebrows, and I was very excited at that time; Puyao is in the Three Realms, but he doesn't see the top of the Buddha. " (In "Bodhisattva Jing Yao", the heavens congratulate the Buddha for his enlightenment).

So there is no big light at the top, which is a table of self-improvement and virtue.