"The mathematical difficulties of the theory of rotation arise chiefly from the want of geometrical illustrations and sensible images, by which we might fix the results of analysis in our minds."

Previous Quote

In the final analysis, national struggle is a matter of class struggle. Among the whites in the United States, it is only the reactionary ruling circles that oppress the black people. They can in no way represent the workers, farmers, revolutionary intellectuals and other enlightened persons who comprise the overwhelming majority of the white people.

— Mao Zedong