You Must Endure a Harsh Winter to Appreciate the Warmth of Springtime in Chinese / Japanese...

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.