若非

ruò fēi qīn shēn jīng lì guo zěn huì zhī xiǎo qí zhōng gān kǔ

若非亲身经历过， 怎会知晓其中甘苦。

You cannot appreciate the difficulty except through personal experience.

ruò fēi wǒ nà shí qīn yǎn kàn jiàn wǒ shì bù huì xiāng xìn de

若非我那时亲眼看见，我是不会相信的。

Were it not for the fact that I saw it with my own eyes, I wouldn't believe it.

tā jīng kǒng de shuō tā ruò fēi wú shén lùn zhě jiù shì bù kě zhī lùn zhě

他惊恐地说他若非无神论者，就是不可知论者。

He claimed with horror that he was, if not an atheist, then an agnostic.

ruò fēi qīng chūn kǔ duǎn shuí huì xiǎng lái rì fāng zhǎng

若非青春苦短，谁会想来日方长。

Youth is short. If not, Who will think of that there's so much time left?