Page 305 - Complete Works of Dr. KCV Volume 1

3rd, the 4th and lastly the 5h which is identical with the Visuddha; and then on to the Cit-lake(point 6) which is above the ajna (the center between the eye-brows). In spiritual development the ajna does not play any part. Some early Yogic works mentioned centres such as Manas, Manonmani, Unmani and lalana etc., above the Ajna. But the ascent to the cit-lake is very important, for one passes the first stage of the journey and enters into the region of the Mind, or the subtle worlds of experience.
The heart-region is indeed the most important for the beginner as well as the advanced seeker. One has constantly to keep this region pure and receptive of the higher forces coursing continuously, without break. This is due to constant looking up to the higher levels or the highest level, called constant remembrance or devotion. The heart, in its perfection, is just devotion flowing or opening upward to the highest Godhead who is leading it.
The heart region is generally taken to be the centre of the Earth (prthvi), and in the sense of being the last evolute, contains all. So the contemplation or understanding of the heart is said to be most necessary.
The five points have been elucidated as follows:-- Point 1-Citta yellow 6
2-Atma red
3-Jnana white 5