Tā duì zhè fèn gōngzuò xīnyuányìmǎ, suíshí kěnéng tiàocáo.
He's restless about this job and could jump ship any time.
Tips
history
Recorded in Wei Boyang's 《参同契》 (Han dynasty) commentary as 心猿不定，意马四驰 — 'the heart-monkey won't sit still, the mind-horse runs in all directions.' A Daoist meditation metaphor that became standard Chinese vocabulary.
memory
Picture a monkey bouncing around a cage and a horse galloping loose — that's what your mind looks like when you can't concentrate.
