我们要保持正面思想。

Wǒmen yào bǎochí zhèngmiàn sīxiǎng.

We should keep a positive mindset.

我父母的思想比较保守。

Wǒ fùmǔ de sīxiǎng bǐjiào bǎoshǒu.

My parents are fairly conservative in their thinking.

他的思想很进步。

Tā de sīxiǎng hěn jìnbù.

His thinking is progressive.