The dialectic is unstable (in the sense that the chemists give to the word), it is even essentially and by definition unstable, so that it has never been able to formulate itself into theses without denaturing itself, and because if one wishes to maintain it's sprit it is perhaps necessary to not even name it.......... One of the tasks of the dialectic, as a situational thought, a thought in contact with begin, is to shake off the false evidences, to denounce the significations cut off from the experience of being, emptied ------ and to criticize itself in the measure that it itself becomes one of them.