Hence there is need for a virtue to moderate other lesser matters where moderation is not so difficult. This virtue is called modesty, and is annexed to temperance as its principal.
 Thomas Aquinas, Summa Theologica (1274). copy citation

add
Author Thomas Aquinas
Source Summa Theologica
Topic modesty moderation
Date 1274
Language English
Reference
Note Translated by Fathers of the English Dominican Province
Weblink http://www.gutenberg.org/cache/epub/18755/pg18755-images.html

Context

“Now whenever there is a special virtue about some matter of very great moment, there must needs be another virtue about matters of lesser import: because the life of man requires to be regulated by the virtues with regard to everything: thus it was stated above (Q. 134, A. 3, ad 1) , that while magnificence is about great expenditure, there is need in addition for liberality, which is concerned with ordinary expenditure. Hence there is need for a virtue to moderate other lesser matters where moderation is not so difficult. This virtue is called modesty, and is annexed to temperance as its principal. Reply Obj. 1: When a name is common to many it is sometimes appropriated to those of the lowest rank; thus the common name of angel is appropriated to the lowest order of angels. In the same way, mode which is observed by all virtues in common, is specially appropriated to the virtue which prescribes the mode in the slightest things.
source