1汉·魏伯阳《参同契》注：“心猿不定，意马四驰。”
2《敦煌变文集·维摩诘经讲经文》：“卓定深沉莫测量；心猿意马罢颠狂。”
3 唐·许浑《题杜居士》诗：“机尽心猿伏，神闲意马行。”
4 语本《维摩经．香积佛品》:以难化之人，心如猿猴，故以若干种法，制御其心，乃可调伏。
5 另：《西游记》中孙悟空又名“心猿”，白龙马又称“意马”。
英文解释
简明释义
a heart like a capering monkey and a mind like a galloping horse -- restless；be prone to outside attractions；fanciful and fickle；harbor monkey-feelings and horse-thoughts；
例句
巨蟹座往往选择一种口味的巧克力就很少再心猿意马。
Cancers often choose one kind of taste in chocolate and rarely then change their minds.
所谓的猴子就是头脑里面仍然充满欲望，心猿意马。
The monkey is the mind and the lustful desires keep running all over the place inside of it.
但是他心猿意马，不能自持，他要问自己，难道主人殷勤接待就是世上最神圣的事物吗？
He was now in imminent danger of asking himself if hospitality were the most sacred thing in the world.
不知所云式聆听：你确信正在谈论的主题超过了你的理解范围，于是你起身离开，至少也是心猿意马。
Over-my-head listening: you are convinced that the subject is beyond you, so you depart, at least in spirit.