这句话的英文翻译是："If you are well, then it is a fine day."

这个说法来源于古代汉语中的一句话："人若安好，便是晴天"。它的意思是说，只要一个人身心健康，那么无论外界如何变化，他都能够平静地面对。

例句：

If you are well, then it is a fine day, no matter what the weather is like outside.

As long as you are healthy and happy, everything else is just background noise.

If you take care of yourself, you can weather any storm.