Doctor Kearney, who formerly, with so much reputation, delivered lectures in this place on the history of Rome, observed to me once, that he was not an optimist, but an "agathist"; that he believed that every thing tended to good, but did not think himself competent to determine what was absolutely the best. The distinction is important, and seems to be fatal to the system of Optimism. [George Miller, "Lectures on the Philosophy of Modern History," Dublin, 1816]
Online Etymology Dictionary, © 2010 Douglas Harper
Examples from the Web for agathist
Kallist violence and Agathist weakness were there in glaring contrast.
The Queen-mother was of course surrounded by Agathist ladies.
The more the Agathist ladies looked at her, the more absurd and bunchy did they feel.
The Agathist and Kallikagathist parties were practically won.
"Then it is an Agathist nomination," said the ladies, prepared to make up their minds accordingly.