Chit is a part of our brain that seeks pleasure. It causes chaitanya. It is self-motivated and always at work. First it records our experiences as likes or dislikes. Then it encourages us towards likes and discourages us from dislikes. It has a unique nature. Though it likes few things, it can't stay with anything for a long time. It gets bored. And then it pushes us to something else. So it makes us move between several things. Have you ever wondered why a man can't be happy doing the something the whole day? Chit is the reason for it. But when chit experiences the bliss of Atman, it doesn't get bored. That is why it is called satchitananda - The real happiness and is always new for the chit. Because the bliss of Atman is always new, chit sticks to it forever.
Who is Bhandasura?
Bhandasura is a demon who lacks chaitanya. He is inactive and lacks any kind of motivation. If at all he acts, it will be to cause harm (either to self or to others). He never thinks of self-realization (moksha). He doesn't follow dharma. He is always in an illusion that what he thinks and does is right and never tries to check himself against what vedic gurus or scholars say. He thinks he is above all and hence others are under privileged. Finally, he spends all his time running after materialistic(carnal) pleasures. There is no difference between Bhandasura and a beast!
Lalitha devi's birth
When devatas prayed for rescue, Lalitha devi emerges from chit agni to kill bhandasura. Let us now ponder about this. Who really is bhandasura? Where actually is Chit? Can we ignite that fire and see that the great mother Lalitha is actually inside us?
Chit
For better understanding, let me give an illustration of the chit of a normal person
The devaganas inside us try to spark the chit. Then comes the chaitanya (conscious). That gives the power of discretion of truth and illusion. The collision between Dharma and Adharma begins. Lalitha devi kills bhandasura. Chit after Lalita Devi kills bhandasura.
Chidagnikunda represents kulakunda. Divine mother rises from there in the form of Kundalini (110th name). Hence she is called Chidagnikunda sambhoota.