“What is knowledge? Ever since class society came into being the world has had only two kinds of knowledge, knowledge of the struggle of production and knowledge of the class struggle. Natural science and social science are the crystallization of these two kinds of knowledge, and philosophy is the generalization and summation of the knowledge of nature.”
Original: (zh-CN) 什么是知识?自从有阶级的社会存在以来,世界上的知识只有两门,一门叫做生产斗争知识,一门叫做阶级斗争知识。自然科学、社会科学,就是这两门知识的结晶,哲学则是关于自然知识和社会知识的概括和总结。 note: "整顿党的作风"
Source: "Rectify the Party's Style of Work" (1942)
Help us to complete the source, original and additional information
Mao Zedong 181
Chairman of the Central Committee of the Communist Party of… 1893–1976Related quotes

Matthew Stewart, The Courtier and the Heretic (2006)
Context: Like Socrates, Spinoza avers that blessedness comes only from a certain kind of knowledge—specifically, the "knowledge of the union that the mind has with the whole of Nature."
... the life of contemplation is also a life within a certain type of community—specifically, a fellowship of the mind. Like Socrates with his circle of debating partners, or Epicurus in his garden with his intellectual companions, Spinoza imagines a philosophical future... upon achieving blessedness for himself, he announces in his first treatise, his first step is "to form a society... so that as many as possible may attain it as easily and as surely as possible." For, "the highest good," he claims, is to achieve salvation together with other individuals "if possible."

661-2
Philosophy, Science and Art of Public Administration (1939)

Source: 1990s and later, Managing in a Time of Great Change (1995), p. 205
Majlisi, Bihārul Anwār, vol. 1, p. 179
Regarding Knowledge & Wisdom, General

Source: Course of Experimental Philosophy, 1745, p. v: Preface
Context: All the knowledge we have of nature depends upon facts; for without observations and experiments our natural philosophy would only be a science of terms and an unintelligible jargon. But then we must call in Geometry and Arithmetics, to our Assistance, unless we are willing to content ourselves with natural History and conjectural Philosophy. For, as many causes concur in the production of compound effects, we are liable to mistake the predominant cause, unless we can measure the quantity and the effect produced, compare them with, and distinguish them from, each other, to find out the adequate cause of each single effect, and what must be the result of their joint action.

“Science gives us knowledge, but only philosophy can give us wisdom.”