Being happy is a great science. If you are not happy, do not be confused. Happiness is hard to achieve.

Being happy is a great science. If you are not happy, do not be confused. Happiness is hard to achieve.

快乐是一门伟大的科学。如果你不快乐，不要困惑。幸福是很难实现的。

-- Peter Deunov 彼得·德乌诺夫