“ When you wish to obtain some concession from a man’s self-love, you must avoid even the appearance of wishing to wound it. ”
 Alexandre Dumas, The Count of Monte Cristo (1845). copy citation

Context

““Ah, but the friends of today are the enemies of tomorrow; Beauchamp, for instance.” “So you recommend——” “I recommend you to be prudent.” “Then you advise me to go alone to Beauchamp?” “I do, and I will tell you why. When you wish to obtain some concession from a man’s self-love, you must avoid even the appearance of wishing to wound it.” “I believe you are right.” “I am glad of it.” “Then I will go alone.” “Go; but you would do better still by not going at all.” “That is impossible.” “Do so, then; it will be a wiser plan than the first which you proposed.”” source