2 sentences for 理智 (lǐ​zhì — rational)

1. 我是个理智的人。

   wǒ shì gè lǐ​zhì de rén.

   I'm a rational person.

   Source: OpenSubtitles

2. 在危机时刻，保持理智非常重要。

   zài wēi​jī shí​kè, bǎo​chí lǐ​zhì fēi​cháng zhòng​yào.

   In times of crisis, it is very important to stay rational.

   Source: Dong Chinese Dictionary