At What Point Do You Give Up?

8... 5... 3... At what point does the class become a mockery. At what point is it no longer worth pursuing. I know the rest of the term is required by the friendship I hold with the students and one's need for credit but will it really continue further? I don't like feeling silly unless that is the point. I don't like feeling like I have to explain and justify these things but that my justification keep dying. I don't want to die.