世界那么大知心的却很少
[shì jiè nèi me dà zhī xīn de què hĕn shăo]
Translating into English, it reads 'the world is so big yet confidants are few.' It reflects a kind of longing amidst loneliness: the vast world out there with all its people does not offer many truly close friends or companions that one can share his or her deepest thoughts with.