First, [the bourgeoisie] must recognize his own impotence, his incapacity to believe in a sense of history, even if his reason leans towards the truth, the passions and prejudices produced by his class position, prevent him from accepting it. So he should not exert himself with proving the truth of the historical mission of the working class; rather, he should learn to subdue his petty bourgeois passions and prejudices. He should take lessons from those who were once as important as he is now but are ready to risk all for the revolutionary Cause.