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The line between confidence and arrogance is very fine, Josh,” Flamel said quietly. “And the line between arrogance and stupidity even finer. Sophie,” he added, without looking at her.

Michael Scott (2012). “The First Codex”, p.528, Delacorte Books for Young Readers
The line between confidence and arrogance is very fine, Josh,” Flamel said quietly. “And the line between arrogance and stupidity even finer. Sophie,” he added, without looking at her.