Agape

The Greek word "Agape" means love. So what kind of love is Agape? Agape is from God, and God alone. There is no natural agape within any man.
Agape, therefore, must be a supernaturally implanted characteristic if found within any man for it says that agape is "of God".
Agape is eternal and totally independent of the object of its favor.
Agape is an affection which stands in spite of any element of attractiveness, desirability, or even value. It also can be hated by the object of its affection, without damaging its intensity or character.
Agape can love while being hated.

Taken from Monergism on Love