"Agape (IPA: [?'g?.pe] or IPA: ['?g??pe]) (Gk. a??p? [a'?a.pi]), is one of several Greek words translated into English as love. The word has been used in different ways by a variety of contemporary and ancient sources, including Biblical authors. Many have thought that this word represents divine, unconditional, self-sacrificing, active, volitional, and thoughtful love. Greek philosophers at the time of Plato and other ancient authors have used forms of the word to denote love of a spouse or family, or affection for a particular activity, in contrast to philia—an affection that could denote either brotherhood or generally non-sexual affection, and eros, an affection of a sexual nature, usually between two unequal partners. The term agape is rarely used in ancient manuscripts, but was used by the early Christians to refer to the self-sacrificing love of God for humanity, which they were committed to reciprocating and practicing towards God and among one another."

http://en.wikipedia.org/wiki/Agape