St. Augustine on "How to Live Well"

The earliest known portrait of Saint Augustine 
in a 6th-century fresco, Lateran, Rome.

To live well in nothing other than to love God with all one's heart, with all one's soul and with all one's efforts; from this it comes about that love is kept whole an uncorrupted (through temperance). No misfortune can disturb it (and this is fortitude). It obeys only [God] (and this is justice), and it is careful in discerning things, so as not to be surprised by deceit or trickery (and this is prudence). -- St. Augustine, De Moribus Eccl. 1, 25, 46:PL, 32, 1330-1331