Happiness lies first of all in health.

幸福首先在于健康。

Cheerfulness is health; its opposite, melancholy, is disease.

欢乐就是健康，忧郁就是病痛。

It is not work that kills, but worry.

工作不损寿，忧郁才伤身。

All work and no play makes Jack a dull boy.

只工作，不玩耍，聪明小伙也变儍。

People who cannot find time for recreation are obliged sooner or later to find time for illness.

没有时间娱乐的人，迟早得生病。

He is wise that knows when he is well enough.

知足为智者。

An apple a day keeps the doctor away.

每天一只苹果，医生远离我。

A good conscience is a continual feast.

问心无愧天天乐。

An ounce of prevention is worth a pound of cure.

一分预防胜过十分治疗。