Kalos kagathos

Kalos kagathos or kalokagathos (Ancient Greek: καλὸς κἀγαθός [kalòs kaːɡatʰós]), of which kalokagathia (καλοκαγαθία) is the derived noun, is a phrase used by classical Greek writers to describe an ideal of gentlemanly personal conduct, especially in a military context.

Its use is attested since Herodotus and the classical period. The phrase is adjectival, composed of two adjectives, καλός ("beautiful") and ἀγαθός ("good" or "virtuous"), the second of which is combined by crasis with καί "and" to form κἀγαθός.

Werner Jaeger summarizes it as "the chivalrous ideal of the complete human personality, harmonious in mind and body, foursquare in battle and speech, song and action".