For Socrates it is eupraxia, which receives closer definition at the hands of Plato, as such harmonious functioning of the parts of man's soul as shall preserve the subordination of the lower to the higher, of the non-rational to the rational.    From Wordnik.com.  [The Catholic Encyclopedia, Volume 7: Gregory XII-Infallability] Reference

(eutychia) -- but in a rational joy, which implies the renunciation of common delights (eupraxia).    From Wordnik.com.  [The Catholic Encyclopedia, Volume 6: Fathers of the Church-Gregory XI] Reference

366 eupraxia, eu prattein — to do well, in the sense both of well or right doing, and of welfare, and is accordingly opposed to eutukhia, mere good luck or success.    From Wordnik.com.  [Memorabilia] Reference