It is to the advantage of despots to keep people ignorant; it is to our advantage to make them intelligent. We must lead all of them gradually away f… - Mao Zedong

Marxists should not be afraid of criticism from any quarter. Quite the contrary, they need to temper and develop themselves and win new positions in the teeth of criticism and in the storm and stress of struggle. Fighting against wrong ideas is like being vaccinated -- a man develops greater immunity from disease as a result of vaccination. Plants raised in hothouses are unlikely to be hardy. Carrying out the policy of letting a hundred flowers blossom and a hundred schools of thought contend will not weaken, but strengthen, the leading position of Marxism in the ideological field.

要使几亿人中的中国人生活得好，要把我们这个经济落后、文化落后的国家，建设成为富裕的、强盛的、 具有高度文化的国家，这是一个很艰巨的任务。我们所以要整风，现在要整风，将来还要整风，要不断把我们身上的错误东西整掉，就是为了使我们能够更好地担负起这项任务，更好地同党外的一切立志改革的志士仁人共同工作。

Discover the truth through practice, and again through practice verify and develop the truth. Start from perceptual knowledge and actively develop it into rational knowledge; then start from rational knowledge and actively guide revolutionary practice to change both the subjective and the objective world. Practice, knowledge, again practice, and again knowledge. This form repeats itself in endless cycles, and with each cycle the content of practice and knowledge rises to a higher level. Such is the whole of the dialectical-materialist theory of knowledge, and such is the dialectical-materialist theory of the unity of knowing and doing.