open one 's heart wide and lay bare one 's thoughts
Open heart, Chinese words, pronunciation for t ǔ x ī NT ǔ D ǎ n, metaphor to treat each other sincerely, say the truth. It's the same as "spit out one's liver and show one's courage". From the answer to Liu Jizhang.
The origin of Idioms
In answer to Liu Jizhang's book, Zhu Xi of Song Dynasty said, "in daily use, when dealing with things, the judgment is straightforward and clear, and when pushing people, it's just like this, and there's no return to each other."
Idiom usage
Used as an attribute or adverbial; used in figurative sentences
open one 's heart wide and lay bare one 's thoughts
like throwing stones into the water - yǐ shí tóu shuǐ
till my heart is weary , and my head aches - gān xīn shǒu jí