Ezt:

There is in addition the clumsy repugnant show of erudition of the self-taught, whose natural pride in his original reasoning has already been broken and who now, as a parvenu of science, feels it necessary to give himself airs with what he neither is nor has. Then the mentality of the petty bourgeois who for instance makes an indecently brutal attack, which is neither shrewd nor profound nor even correct....

http://www.marxists.org/archive/marx/works/1865/letters/65_01_24.htm