病は気から

Mind over matter.

例文

「やまいは　きから」と　いいます。あまり　おちこまないで　ください。

「病は気から」と言います。あまり落ち込まないでください。

As they say, "mind over matter". Please don't be depressed.

医食同源

you are what you eat
風邪は万病のもと

The common cold can develop into all kinds of illness.
慣用句

idiom
ことわざ

proverb
住めば都

Home is where you make it. (a Japanese proverb which means wherever you live, once you get used to living there, it becomes home)