Envy, jealousy, ambition, any kind of greed are passions; love is an action, the practice of human power, which can be practiced only in freedom and never as a result of compulsion.
Love is an activity, not a passive affect; it is a "standing in," not a "falling for." In the most general way, the active character of love can be described by stating that love is primarily giving, not receiving.

The Art of Loving (1956)