A strange and somewhat impassive physiognomy is often, perhaps, an advantage to an orator, or leader of any sort, because it helps to fix the eye and fascinate the mind.

Summary

This quote suggests that having a unique and somewhat expressionless facial appearance can be advantageous for someone who speaks publicly or leads others. Such a physiognomy is considered beneficial as it can captivate the audience and hold their attention. The implication here is that a person's unusual or enigmatic face helps to create a certain allure, making them more effective in their communication or leadership roles.