What is to be done

b. New advocates of freedom of criticism
Demand freedom for opportunism.

The view: People are above all.

Useless thinking in a fight is to commit suicide.
Put things into context. Marxism and Leninism is great but no one can teach me properly. I must learn them by myself. I must be successful. Kill useless thinking.

No useless thinking is a revolution, a real revolution. But the enemy is very strong. I must fight and win. I will fight until death against useless thinking.

Engel recognized not two forms of struggle (political and economic) but three, including theoretical struggle.

It is at the most important to kill useless thinking.

Nothing is more important than that.