What were lenin's main concern about joseph stalin?

Lenin believed Stalin had "concentrated enormous power in his hands" and was not sure "he always knows how to use that power with sufficient caution"

apartheid, (afrikaans: “apartness”) policy that governed relations between south africa's white minority and nonwhite majority and sanctioned racial segregation and political and economic discrimination against nonwhites. people should not get this wrong. i was just answering a question.

explanation:

the president, prime minister, chief justice, speakers and ministers take their oath of office. the oath is taken in bengali