2 sentences for 理性 (lǐ​xìng — reason)

1. 真理往往存在于人类的理性之中。

   zhēn​lǐ wǎng​wǎng cún​zài yú rén​lèi de lǐ​xìng zhī​zhōng.

   Truth often resides within human reason.

   Source: Dong Chinese Dictionary

2. 我们需要在公共话语中保持客观和理性。

   wǒ​men xū​yào zài gōng​gòng huà​yǔ zhōng bǎo​chí kè​guān hé lǐ​xìng.

   We need to maintain objectivity and rationality in public discourse.

   Source: Dong Chinese Dictionary