For the shameless person is quite apathetic at what is disgraceful, while the modest person is easily affected even at the very appearance of it.
 Plutarch, Moralia (c. 100 AD). copy citation

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Author Plutarch
Source Moralia
Topic appearance
Date c. 100 AD
Language English
Reference
Note Translated by Arthur Richard Shilleto
Weblink http://www.gutenberg.org/files/23639/23639-h/23639-h.htm

Context

“Among these I class shyness, no bad sign in itself, though it affords occasion to vice. For the modest oftentimes plunge into the same excesses as the shameless, but then they are pained and grieved at them, and not pleased like the others. For the shameless person is quite apathetic at what is disgraceful, while the modest person is easily affected even at the very appearance of it. Shyness is in fact an excess of modesty. And thus it is called shamefacedness, because the face exhibits the changes of the mind. For as dejection is defined to be the grief that makes people look on the ground, so shamefacedness is that shyness that cannot look people in the face.” source