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]
Examples from the Web for agathist
But the effect on the Agathist ladies was something very much more severe.
The Agathist and Kallikagathist parties were practically won.
Still, whatever might be the artistic verdict, politically it was an immense success, and Agathist spirits ran high.
The more the Agathist ladies looked at her, the more absurd and bunchy did they feel.
Kallist violence and Agathist weakness were there in glaring contrast.