It is scarcely exaggeration to say that if one is not a little mad about Balzac at twenty, one will never live; and if at forty one can still take Rastignac and Lucien de Rubempre at Balzac's own estimate, one has lived in vain.
My first duty to write a gripping yarn. Second is to convey credible characters who make you feel what they feel. Only third comes the idea.