In Greek, the words are eros , philila , and agape . In Latin the words are amor , amacita , and caritas . It is only erotic or amorous love that involves sexual desire and activity, but even erotic love is benevolent in its concern for the enjoyment of sex by the loved one. Sexual activity devoid of benevolent impulse is not love but lust, and lust, like greed, is a mortal sin. Love is always altruistic, not selfish.
Love is more altruistic than justice.
Justice is primarily negative, its precept being not to judge or harm others. But love is entirely positive in it precepts. Aristotle us that if all human beings were friendly, justice would not be necessary, for if they loved those whom they thought admirable, they would be benevolently disposed toward them.