ataraxia

And I think what I found is much like what Greek philosophers called ataraxia, a suspended kind of calm in which you can find a surprising strength.

Christians for a century or two never thought of ataraxia or apathy, and, though Clement of Alexandria plays with them, he tries to give them a new turn.

Such an ataraxia may have been obtained by a few sages of old, but it is hardly human, and Jefferson, like Adams, was very human.

When the sage realizes this, he will cease to prefer one course of action to another, and the result will be apathy, "ataraxia."

The method, however, by which ataraxia or peace of mind could be reached, was peculiar to the Sceptic.