It was not by choice that I met all the four Asuras - it was a decision of the Supreme. The first one, whom religions call Satan, the Asura of Consciousness, was converted and is still at work. The second [the Asura of Suffering] annulled himself in the Supreme. The third was the Lord of Death (that was Theon). And the fourth, the Master of the world, was the Lord of Falsehood. page 367 - Mother's Agenda, volume 2, 5th Nov. - 1961

I have had other similar experiences - on Durga's day, for instance, when Sri Aurobindo was still here (you know, that's the day when Durga masters an asura; she doesn't kill him, she masters him). Well, each year one particular type of thing was undermined (and my experiences were never mental: the experience would suddenly come, and AFTERWARDS I would realize it was Durga's day), and each time I used to tell Sri Aurobindo, "Look - today this (or that) thing has been cut off at the roots." That's how it works with the adverse forces - yes, like something being uprooted from the world. Whatever has already spread out keeps going and follows its karma, but the SOURCE is dried up. That's also what happened (it was in 1904, I believe) when the Asura of Consciousness and Darkness made his surrender and was converted; he told me, "I have millions and millions of emanations, and these will keep on living, but their source has now run dry."[[This seems to refer to the being Mother endowed with a body (in 1906, at Tlemcen), and who went to set up the revolution in China. ]] How much time will it take to exhaust it all? ... We can't say, but the source has dried up and that is something extremely important. In 1920, that terror was trying to spread all over the world and to become really catastrophic; and then in my inner vision I could see that a whole movement had dried up at its source. This means that little by little, little by little, little by little ... the karma is being exhausted. page 305 , Mother's Agenda , volume 3 , 8th Aug 1962.