Winter in Chinese / Japanese...

dōng

fuyu

동

冬 is the word/character used to describe the Winter season in Chinese and Japanese.

It also means winter in Korean Hanja, though a second character is usually added in Korean.

bù jīng dōng hán bù zhī chūn nuǎn

This literally translates as: Without having experienced the cold of winter, one cannot appreciate the warmth of spring.

Figuratively, this means: One cannot truly appreciate happiness without having gone through hardship.

There are many contrasts in life. One simply cannot fully know what joy is without having experienced misery, difficulty, and pain. How could you explain "light" if you did not have "darkness" to compare it to?

Embrace hardship, as it makes the good times seem even better.

bù dāng hé shàng bù zhī tóu lěng

This Chinese proverb literally translates as: [One who has] not been a monk [does] not know [the feeling of a] cold head.
I need to explain that a Chinese Buddhist monk always has a shaved head, and thus a cold head in winter.

Figuratively, this means: One cannot know the true meaning of hardship until one has experienced it oneself.

This is an idiom in Chinese, so the figurative meaning is what people perceive when they hear or read this phrase. Just as in English, when someone says, "The grass is always greener," one will think about the idea of jealousy, rather than the quality of one's lawn.