Light of Love in Chinese / Japanese...

四拳波羅蜜大光明 is “shiken haramitsu daikōmyō,” a famous Japanese Buddhist mantra.

四拳 = shi-ken = four fists (many translate this as “four hearts”).
波羅蜜 = ha-ra-mitsu = A loanword representing pāramitā, or entrance into Nirvana. Awkwardly, it also means jackfruit.
大光明 = dai-kou-myo = big/great light bright (great bright light).

Shiken represents four hearts:
1. The Merciful Heart - Love and caring for all living things.
2. The Sincere Heart - Pursues righteousness, or the right path - sincerely trying to do what is right.
3. The Attuned Heart - Knows that nature and fate have their ways, and thus stay in tune with the universe.
4. The Dedicated Heart - Steadfast on the chosen path to the end.

道 is the character “dao” which is sometimes written as “tao” but pronounced like “dow” in Mandarin.

道 is the base of what is known as “Taoism.” If you translate this literally, it can mean “the way” or “the path.”

Dao is believed to be that which flows through all things and keeps them in balance. It incorporates the ideas of yin and yang (e.g. there would be no love without hate, no light without dark, no male without female.)

The beginning of Taoism can be traced to a mystical man named
Lao Zi (604-531 BC), who followed, and added to the teachings of Confucius.

More about Taoism / Daoism here.

Note that this is pronounced “dou” and sometimes “michi” when written alone in Japanese but pronounced “do” in word compounds such as Karate-do and Bushido. It's also “do” in Korean.

Alternate translations and meanings: road, way, path; truth, principle province.

Important Japanese note: In Japanese, this will generally be read with the road, way, or path meaning. Taoism is not as popular or well-known in Japan so Daoist/Taoist philosophy is not the first thing a Japanese person will think of when they read this character.

See our Taoism Page