3 sentences

1. 他的心智发育非常健全。

   tā de xīn​zhì fā​yù fēi​cháng jiàn​quán.

   His mental development is very sound.

   Source: Dong Chinese Dictionary

2. 瘫痪的是他一部份的心智。

   tān​huàn de shì tā yī bù​fèn de xīn​zhì.

   What's paralyzed is a part of his mind.

   Source: OpenSubtitles

3. 老师的一番教诲，极具启人心智的力量。

   lǎo​shī de yī fān jiào​huì, jí jù qǐ rén xīn​zhì de lì​liang.

   The teacher's teachings have a powerful enlightening effect on the mind.

   Source: Dong Chinese Dictionary