what Marx actually said was
It will be the workers, with their courage, resolution and self-sacrifice, who will be chiefly responsible for achieving victory. The petty bourgeoisie will hesitate as long as possible and remain fearful, irresolute and inactive..... ... the rule of the bourgeois democrats, from the very first, will carry within it the seeds of its own destruction, and its subsequent displacement by the proletariat will be made considerably easier..