a tiger caught a fox in a forest, and was just about to eat it, when the fox said, 'you mustn't eat me. i was sent by heaven to rule the animals. by eating me, you will violate（违反，侵犯） the command of heaven. if you don't believe me, just follow me to see whether the animals are of me.' the tiger agreed, and followed the fox as it walked around the forest. the animals all ran away on seeing them. the tiger thought they were of the fox, so he let it go. he didn't realise that it was him that the beasts were really of.
this idiom means relying on another's power to bully（欺负） or frighten others.
战国时代，当楚国最强盛的时候，楚宣王曾为了当时北方各国，都惧怕他的手下大将昭奚恤，而感到奇怪。因此他便问朝中大臣，这究竟是为什么。
当时，有一位名叫江乙的大臣，便向他叙述了下面这段故事：
"从前在某个山洞中有一只老虎，因为肚子饿了，便跑到外面寻觅食物。当他走到一片茂密的森林时，忽然看到前面有只狐狸正在散步。他觉得这正是个千载难逢的好机会，于是，便一跃身扑过去，毫不费力的将他擒过来。
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