Peace of Mind in Chinese / Japanese...

和平 is the Chinese order for these two characters, which means peace but can also be translated as amicability, specifically, or mildness. 和平 is often translated as a simple way to say “peace of mind.” This combination is used in Korean Hanja to mean “peace and harmony.”

Alone, the first character means peace and harmony.
The second character means balance when read by itself.

Note: 和平 are often seen in the opposite order in Japanese with the same meaning (You'll sometimes find them in this order in Japan, so either way is OK).

內心的寧靜 is the long way to express the idea of “peace of mind” in Chinese.

The first two characters mean heart or “innermost being.”
The middle character is a connecting modifier.
The last two characters mean peace, tranquility, or serenity.

Some may also translate this as “inner peace,” but I like our other inner-peace options for that idea.

This kind of makes sense in Korean but will have an archaic read - even by those who can understand Korean Hanja.

安心 can be defined as relief, peace of mind, feeling at ease, to be relieved, to set one's mind at rest, and easiness.

安心 is a nice word that encompasses great meanings within just two characters. Some of the other meanings include pacifying, settling the mind, and peace of mind. It's also the idea of feeling a sense of security, safety, and confidence in your state of well-being.

This can be used by everyone, but some consider it to be a Buddhist concept (You'll find it in your Zen dictionary).

Note: Can be romanized as Anshin or Anjin in Japanese.

This ancient Chinese proverb can be translated as “Patience brings peace of mind,” “One who has patience finds peace,” and a few other ways.

忍耐は心の平和をもたらす means “patience brings peace of mind,” in Japanese.

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.

白天不做亏心事夜半敲门不吃惊 literally translates as: [If one does] not do bad things in the daytime, one need not be alarmed at knocks on the door in the middle of the night.

The meaning is something like, “A quiet conscience sleeps in thunder.” Basically, the message is, “don't commit crimes and you won't be jumpy every time the doorbell rings (so don't do anything wrong and your life will have fewer worries and you can sleep at night).”

內心的平靜 means inner peace or peace of mind.

This is the Chinese equivalent of the French phrase Paix de l'esprit.

踏實 means realistic or practical.

If you need a reminder to remain grounded in your life, this is a great way to do that. 踏實 also can have the meanings of “at ease,” “down to earth,” “to have peace of mind,” “free from anxiety,” steady, or steadfast.

眉を開く is a Japanese proverb and expression that means “to feel relieved,” “to forget about one's troubles,” or “to settle into peace of mind.”

The literal words suggest relaxing your eyebrows or face. Allow worry or concern to go away, and just be content with “letting it be.”

Note: Because this selection contains some special Japanese Hiragana characters, it should be written by a Japanese calligrapher.

My Australian friends always say, “No worries, mate.” It's caught on with me, though I drop the “mate” part since it confuses my fellow Americans.

If you would like to express the idea of “no worries,” 放心 is the best and most natural way to say it in Chinese.

The characters you see to the left can be translated as “put your mind at rest” or “to be at ease.” You could literally translate “no worries,” but it doesn't “flow” like this simple Chinese version.

For your info, the first character means to release, to free, to let go, to relax, or to rest. The second character means your heart or your mind.

Note that in Japanese and Korean, this holds the similar meaning of “peace of mind” but can also mean absentmindedness or carelessness, depending on context.