你是你自己最大的敌人。 - Zhictionary

Zhictionary

你是你自己最大的敌人。

You're your own worst enemy.

Source: Tatoeba

Sentence Composition

you (informal, as opposed to courteous 您 nín)

you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)

to be (followed by substantives only)
correct; right; true
(respectful acknowledgement of a command) very well
(adverb for emphatic assertion)

variant of 是 shì

you (informal, as opposed to courteous 您 nín)

you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)

oneself
one's own

largest; biggest; greatest; maximum; maximal

of; ~'s (possessive particle)
(used after an attribute when it modifies a noun)
(used at the end of a declarative sentence for emphasis)
(used after a noun, verb or adjective to form a nominal expression, as in 皮革的 pígéde "one made of leather" or 跑堂兒的 pǎotángrde "a waiter (literally, one who runs back and forth in a restaurant)" or 新的 xīnde "new one")
also pr. dì or di in poetry and songs

a taxi; a cab (abbr. for 的士 dīshì)

really and truly

(bound form) bull's-eye; target

classifier: 個