What is love?

Even after all this time
The sun never says to the earth, "You owe me."
Look what happens with a Love like that!
—It lights the whole Sky. — Hafiz

you know LOVE,

that word love is a very serious thing, and
if you don't watch out I tell ya
that (Love's gonna get you) because a lot of
people out here say "i love my
car" or "I love my chain" or or "I'm
just in love with that girl over
there"...

ya know a lot of people believe that that
word Love is real soft, but when
you use it in your vocabulary like your
addicted to it it sneaks right up
and takes you right out...

— Boogie Down Productions

One of the most popular phrases in any language is probably "I love you." In Japanese, "love" is "ai （愛）," and the verb form "to love" is "aisuru （愛する）." "I love you" can be literally translated as "aishite imasu （愛しています）". "Aishiteru （愛してる）," "aishiteru yo （愛してるよ）" or "aishiteru wa (愛してるわ, female speech)" is normally used in conversation. However, the Japanese don't say "I love you" as often as Western people do, because of cultural differences. I am not surprised if some Japanese say that they have never used these expressions in their life.

In the Persian culture, everything is encompassed by love and all is for love, starting from loving friends and family, husbands and wives, and eventually reaching the divine love that is the ultimate goal in life.

Ishq, or divine love, is the emphasis of Sufism. Sufis believe that love is a projection of the essence of God to the universe. God desires to recognize beauty, and as if one looks at a mirror to see oneself, God "looks" at itself within the dynamics of nature. Since everything is a reflection of God, the school of Sufism practices to see the beauty inside the apparently ugly. Sufism is often referred to as the religion of love. God in Sufism is referred to in three main terms, which are the Lover, Loved, and Beloved, with the last of these terms being often seen in Sufi poetry. A common viewpoint of Sufism is that through love, humankind can get back to its inherent purity and grace. The saints of Sufism are infamous for being "drunk" due to their love of God; hence, the constant reference to wine in Sufi poetry and music.

In Buddhism, Kāma is sensuous, sexual love. It is an obstacle on the path to enlightenment, since it is selfish. Karuṇā is compassion and mercy, which reduces the suffering of others. It is complementary to wisdom and is necessary for enlightenment. Adveṣa and maitrī are benevolent love. This love is unconditional and requires considerable self-acceptance. This is quite different from ordinary love, which is usually about attachment and sex and which rarely occurs without self-interest. Instead, in Buddhism it refers to detachment and unselfish interest in others' welfare. The Bodhisattva ideal in Mahayana Buddhism involves the complete renunciation of oneself in order to take on the burden of a suffering world. The strongest motivation one has in order to take the path of the Bodhisattva is the idea of salvation within unselfish, altruistic love for all sentient beings.

In Confucianism, lian is a virtuous benevolent love. Lian should be pursued by all human beings, and reflects a moral life. The Chinese philosopher Mozi developed the concept of ai (愛) in reaction to Confucian lian. Ai, in Mohism, is universal love towards all beings, not just towards friends or family, without regard to reciprocation. Extravagance and offensive war are inimical to ai. Although Mozi's thought was influential, the Confucian lian is how most Chinese conceive of love.