"Every individual should constantly bear in mind that the absence of or poorly organized oversight as well as a low degree of demandingness on oneself and others lead to the appearance and growth of weeds in our ranks. Weeds are the worst enemy of a good harvest. It is our sacred task promptly to pull out by the roots weeds of all types and varieties. Each and every member of the socialist society is obligated strictly to evaluate his activities and conformity between the level of his knowledge and abilities with today's demands, and constantly to expand his horizons of knowledgeability, bearing in mind that history is not standing still, that every day there is an increase in the pace of scientific and technological advance, work forms and methods are enriched, and the know-how and abilities of leading labor performers become improved. Working systematically to increase demandingness on ourselves and others, we should always ensure an implacable attitude toward violations of party, state and labor discipline and eliminate cases of failure to carry out party and government decisions and to observe the laws of the state."
January 1, 1970
https://en.wikiquote.org/wiki/Yumjaagiin_Tsedenbal