"Though I speak with the tongues of men and of angles, but don't have love, I have become as sounding brass or a clanging cymbal.  And though I have the gift of prophecy and understand all mysteries and all knowledge, and though I have all faith, so that I could move mountains, but have not love, I am nothing.  And though I give all my goods to feed the poor, and though I give my body to be burned, but have not love, it profits me nothing.  Love suffers long and is kind; love does not envy; love does not parade itself, is not puffed up.  Love does not behave rudely, love does not seek its own, love is not provoked, love thinks no evil.  Love does not rejoice in iniquity, but rejoices in the truth.  Love bears all things, love believes all things, love hopes all things, love endures all things.  Love never fails.  But where there are prophecies, they will fail; where there are tongues, they will cease; where there is knowledge, it will vanish away.  For we know in part and we prophesy in part.  But when that which is perfect has come, then that which is in part will be done away.  When I was a child, I understood as a child, I thought as a child; but when I became a man, I put away childish things.  For now we see in a mirror, dimly but then face to face.  Now then I shall know just as I am known.  And now abides faith, hope and love.  These three, but the greatest is love."  1 Corinthians 13.  

Definition of Love - God is Love.