A political leader who ...

A political leader who desires to be useful to the revolutionary proletariat must be able to distinguish concrete cases of compromises that are inexcusable and are an expression of opportunism and treachery.
A political leader who desires to be useful to the revolutionary proletariat must be able to distinguish concrete cases of compromises that are inexcusable and are an expression of opportunism and treachery.

More phrases

Courage - a perfect sensibility of the measure of danger, and a mental willingness to endure it.
 William Tecumseh Sherman
I'm a fighter through and through. I don't fear any person and to go inside that ring with a feared mentality, why even go inside the ring?
 Daniel Jacobs
I think there was the studio mentality for a long time that women and girls can relate to a male hero, but boys and men can't relate to a female hero.
 Jennifer Lawrence
Bravery is fearlessness-the absence of fear. The merest dolt may be brave because he lacks the mentality to appreciate his danger.
Courage is rightly esteemed the first of human qualities... because it is the quality which guarantees all others.

Quotes from the same author

Russians are too kind, they lack the ability to apply determined methods of revolutionary terror.
Only struggle educates the exploited class. Only struggle discloses to it the magnitude of its own power, widens its horizon, enhances its abilities, clarifies its mind, forges its will.
The art of any propagandist and agitator consists in his ability to find the best means of influencing any given audience, by presenting a definite truth, in such a way as to make it most convincing, most easy to digest, most graphic, and most strongly impressive.
The history of all countries shows that the working class exclusively by its own effort is able to develop only trade-union consciousness.
It is necessary to be able to withstand all this, to agree to any and every sacrifice, and even - if need be - to resort to all sorts of stratagems, manoeuvres and illegal methods, to evasion and subterfuges in order to penetrate the trade unions, to remain in them, and to carry on Communist work in them at all costs.