Nothing is so certain as a well settled idea of superiority to prove the inferiority of the man who has that opinion of himself.
 Alexandre Dumas, The Vicomte of Bragelonne (1847). copy citation

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Author Alexandre Dumas
Source The Vicomte of Bragelonne
Topic superiority opinion
Date 1847
Language English
Reference
Note
Weblink https://www.gutenberg.org/files/2681/2681-h/2681-h.htm

Context

“Besides, in the present case, after Monsieur had left, and after the courteous and affectionate recognition of the young queen and of the queen-mother, and the careless and indifferent notice of Madame, which all the courtiers had remarked; all these motives gave the lover the advantage over the husband. Monsieur was too great a personage to notice these details. Nothing is so certain as a well settled idea of superiority to prove the inferiority of the man who has that opinion of himself. The king arrived. Every one looked for what might possibly happen in the glance, which began to bestir the world, like the brow of Jupiter Tonans. Louis had none of his brother’s gloominess, but was perfectly radiant.” source