Where do correct ideas come from? Do they drop from the skies? No. They come from social practice, and from it alone; they come from three kinds of social practice, the struggle for production, the class struggle and scientific experiment.

To investigate a problem is, indeed, to solve it.

If you want to know the theory and methods of revolution, you must take part in revolution.

We shall heal our wounds, collect our dead and continue fighting.

The People's Liberation Army is always a fighting force. Even after countrywide victory, our army will remain a fighting force during the historical period in which classes have not been abolished in our country and the imperialist system still exists in the world. On this point, there should be no misunderstanding or wavering.

In class society everyone lives as a member of a particular class, and every kind of thinking, without exception, is stamped with the brand of class.

Take the ideas of the masses and concentrate them, then go to the masses, persevere in the ideas and carry them through, so as to form correct ideas of leadership-such is the basic method of leadership.