Mīmāṁsaka kahe īśvara haya karmera aṅga (CC Madhya 25.50). You know there are six kinds of philosophies in India; the mīmāṁsaka philosophy; and Sāṅkhya philosophy; and nyāya—nyāya means logic—nyāya philosophy; then Māyāvāda philosophy; then Patañjali, yoga system, Patanjali philosophy; and at last, this Vedānta philosophy. So there are six kinds of philosophers. Out of them, only the Vedānta philosophy is compiled by Vyāsadeva. So it is considered that Vedānta philosophy only establishes the existence of God; all other philosophies, they do not admit the existence of God. They are atheistic philosophies. Mīmāṁsaka.
Mīmāṁsaka means they have decided that "There is no necessity of worshiping God. If there is any God, all right, you do your duty nicely, and He will be obliged to award you the required result. Then there is no question of flattering Him." That is mīmāṁsaka philosophy. Just like in government, there are so many departments. So you need not to flatter him, but you do your duty, you pay your tax, you abide by the laws, then everything will be right. You need not worship any person. That is their philosophy, mīmāṁsa, karma-mīmāṁsa.
Everyone is . . . under the spell of karma, everyone is suffering or enjoying as the result of his past deeds. So the karma-mīmāṁsaka philosopher says, "There is no necessity of worshiping God. You do your duty." Just like some moralists say that "What is the use of God, God, Hare Kṛṣṇa? Just do your duty." But he does not know that what is his duty.
The duty is only to worship God, and nothing more. That is the duty. All other duties are māyā's spell only. There is no other duty. Because this human life is meant for that duty. The animals cannot execute that duty. Only the human being. Therefore our only duty is to understand God and engage ourself in that way. So these different kinds of philosophies are there. We shall gradually discuss.