The human being needs sadness as much as he needs joy.
【译文】三个人一起走路，其中必定有可以为我所学习的人。我选取那些优良的方面学习它，对那些不良的方面则加以改正。
Sustainability isn't an option - it's our responsibility to the next generation.
"Jealousy is not a sign of love, but rather a defense against the threat of losing a valued relationship."