Martin Luther King, Jr., at the YMCA and YWCA at the University at Berkeley, June 4, 1957:

The Greek language uses three words for love. It talks about eros. Eros is a sort of aesthetic love. It has come to us to be a sort of romantic love and it stands with all of its beauty. But when we speak of loving those who oppose us we’re not talking about eros. The Greek language talks about philia and this is a sort of reciprocal love between personal friends. This is a vital, valuable love. But when we talk of loving those who oppose you and those who seek to defeat you we are not talking about eros or philia. The Greek language comes out with another word and it is agape [ä′gə-pā′]. Agape is understanding, creative, redemptive good will for all men. Biblical theologians would say it is the love of God working in the minds of men. It is an overflowing love which seeks nothing in return. And when you come to love on this level you begin to love men not because they are likeable, not because they do things that attract us, but because God loves them and here we love the person who does the evil deed while hating the deed that the person does.

The world would benefit from a larger outpouring of agape right about now.