"The Party must be, first of all, the advanced detachment of the working class. The Party must absorb all the best elements of the working class, their experience, their revolutionary spirit, their selfless devotion to the cause of the proletariat. But in order that it may really be the armed detachment, the Party must be armed with revolutionary theory, with a knowledge of the laws of the movement, with a knowledge of the laws of revolution. Without this it will be incapable of directing the struggle of the proletariat, of leading the proletariat."