taken for granted
It means that the reason is of course like this. It means that what happens in reason is reasonable and can not be doubted.
The origin of Idioms
Wang Tong's Wenzi weixiangpian in Sui Dynasty: "it's not debate, but reason is ear.". "
Idiom usage
Subject predicate; predicate, attribute, adverbial; commendatory
Examples
It's natural that good people are blessed and evil people are harmed. ——Zhao Bi in Ming Dynasty
taken for granted
ruin one 's figure and destroy one 's disposition through grief - huǐ xíng miè xìng
hold in one 's horse near a precipice - lín yá lè mǎ
Preserved bottle gourd with black wine - xuán jiǔ hù fǔ