The next chakra is the one situated at the throat. This is known as the Vishuddha chakra–the chakra of purity. The Vishuddha chakra is symbolised by an oval and its representative colour is indigo and the tattwa is akasha–the ether. Akasha tattwa, according to the Sankhya philosophy and the tantra, is that from which everything else comes, all forms are created and that into which all forms merge at the end. So, this is akasha. In English, it can be best translated as ether but then it is just a translation.
So, now the Kundalini energy has come up to, let us say, the Vishuddha chakra and therefore consciousness has risen from the gross–from solid to liquid to the still subtler gaseous and then, on to the level of akasha which is ether.
Now, what remains are two chakras. The next one situated between the eyebrows is called the Brumadhya or the Agya chakra. It is symbolised as a pure, white, two-petaled lotus with a small milk white linga in the centre and it is the centre that opens the doorways to the highest levels of consciousness. If you see the figure of Lord Shiva, lord of the yogis, the only deity who sits in the cross legged posture and meditates, you’ll see that he has a third eye.
Now that third eye is a very important centre, a very important chakra called the Agya chakra or the Brumadhya. There is a story in the Shiva Purana about Kamadeva–the god of love, the god of sex, the god of emotion, the god of desire. Kama can best be translated as desire; any desire–sensuous, non-sensuous desire as such. Kamadeva, the god of desire, is supposed to shoot arrows of flowers at human beings and even the gods and they fall under his power.
When the third eye or the centre, which is known as the Agya chakra is activated by the Kundalini energy, then the mind understands the reality behind all illusion.