Justin Taylor offers a Biblical perspective:
What Is Love?
God and Love
God is love.
Love is a gift of God.
What Love Is
Love is patient.
Love is kind.
What Love Is Not
Love is not arrogant.
Love is not rude.
Love is not irritable.
Love is not resentful.
What Love Does Not Do
Love does not envy.
Love does not boast.
Love does not insist on its own way.
Love does not rejoice at wrongdoing.
What Loves Does
Love rejoices with the truth.
Love bears all things.
Love believes all things.
Love hopes all things.
Love endures all things.
Love lasts forever.
Love fulfills the law.