Acara and vicara, there are two things. Vicara means consideration. That is vicara. Just like vicara prati. The high-court judge is called vicara prati. Two opposite party presenting their grievances and he will consider and give his judgment. So vicara-pandita. Unless one is very learned, he cannot consider things. But acara. Acara everyone can do. Acara means just like to rise early in the morning, to take bath, chant Hare Krsna, have tilaka, observe mangala-arati. This is called acara. Then there is hygienic. And vicara means consideration. So in the asuras, both things are lacking.
Lecture on Bhagavad-gita 16.7, Hyderabad, 15 December, 1976