入情入理

tā shuō de rù qíng rù lǐ dà jiā xīn fú kǒu fú

他说得入情入理，大家心服口服。

Everybody was sincerely convinced by his fair and reasonable explanations.

tā de jiàn yì rù qíng rù lǐ

他的建议入情入理。

His suggestion is fair and just.