隨心而行 is the closest way to express this idea in Chinese. Literally translated, this phrase means “Allow your heart to dictate your behavior” or “Let your heart guide your conduct” in Chinese. You could also translate this as “follow your heart.” Or, with a bit of imagination, it could mean: “let your spirit be your guide.”

Note that in some cases, “heart” can mean “mind,” “soul” or even “spirit” in Chinese. In ancient China, it was thought that the big pumping organ in your chest was where your thoughts came from, or where your soul resides.
Ancient western thought followed a similar belief. Thus phrases like “I love you with all my heart” and “I give you my whole heart.”

In Chinese, this can mean losing one's love; to breaking up (in a romantic relationship); to feel jilted.

In Japanese Kanji, this means disappointing love, broken heart, unrequited love, or being lovelorn.

失戀 is also valid in old Korean Hanja, which means unrequited love, unreturned love, a disappointment in love, or a broken heart.

Note: In modern Japan, they will tend to write the more simple 失恋 form instead of 失戀. If you order this from the Japanese master calligrapher, expect the more simple modern version to be written (unless you give us instructions to use the older or more traditional version).