The diplomatist and the two women had very soon discovered Lucien's weak side. The poet's head was turned by the glory of the aristocracy; every man who entered the rooms bore a sounding name mounted in a glittering title, and he himself was plain Chardon. Unspeakable mortification filled him at the sound of it. Wherever he had been during the last few days, that pang had been constantly present with him. He felt, moreover, a sensation quite as unpleasant when he went back to his desk after an evening spent in the great world, in which he made a tolerable figure, thanks to Coralie's carriage and Coralie's servants.
reading this my conclusion is like, it's important to steel yourself so that you are not harmed by such petty things
("This humiliation he experienced everywhere he went during the next few days.")