擒山中之贼易，捉心中之贼难 (擒山中之賊易，捉心中之賊難) qín shān zhōng zhī zéi yì, zhuō xīn zhōng zhī zéi nán

qín shān zhōng zhī zéi yì, zhuō xīn zhōng zhī zéi nán phrase It is easy to catch thieves in the mountains, but hard to catch the thieves in one's mind.
Domain: Buddhism 佛教 , Subdomain: Fo Guang Shan
Notes: (Glossary of Humanistic Buddhism)