There is a beloved four-character idiom (Saja-성어 / 사자성어) that Koreans always use to describe the crisp autumn season: Cheon-go-ma-bi (천고마비 – 天高馬肥). It literally translates to: “The sky is high, and the horses grow fat.” In ancient times, this phrase depicted clear blue skies, endless harvests, and abundant food after a long summer. Today, it…