2 sentences

1. 听了这番话，他顿觉豁然开朗。

   tīng le zhè fān huà, tā dùn jué huò​rán​kāi​lǎng.

   After hearing these words, he suddenly felt enlightened.

   Source: Dong Chinese Dictionary

2. 这位高人指点了我几句，让我豁然开朗。

   zhè wèi gāo​rén zhǐ​diǎn le wǒ jǐ jù, ràng wǒ huò​rán​kāi​lǎng.

   This expert gave me some advice that suddenly enlightened me.

   Source: Dong Chinese Dictionary