A leader’s duty is not only to point out the orientation of the struggle and
lay down its tasks, he must also sum up concrete experience and spread it
rapidly among the masses so that what is correct will be promoted and what is
wrong will not be repeated.
***
It is necessary to sum up experience conscientiously.
When one goes to a unit to get to know the situation there, one must
become acquainted with the whole process of the movement: its inception,
its development, and its present state; how the masses have acted and how the
leadership has acted; what contradictions and struggles have emerged and what
changes have occurred in these contradictions; and what progress people have
made in their knowledge so as to find out its laws.