2 sentences

1. 我们坚信正义必胜。

   wǒ​men jiān​xìn zhèng​yì bì shèng.

   We firmly believe that justice will prevail.

   Source: Dong Chinese Dictionary

2. 无论身处任何环境，他都坚信自己。

   wú​lùn shēn​chǔ rèn​hé huán​jìng, tā dōu jiān​xìn zì​jǐ.

   He believed in himself, in any situation.

   Source: OpenSubtitles