The lowest form of love (experienced in duality/polarity) is conditional. It can change at the drop of a hat based on changing perceptions...or circumstances...or situations. It relies on a dance between two or more people (though it can be directed at things, as well) who themselves are in constant flux. It is often excluding and sees another as "special," though this can change. This imperfect love is ego-centered and fickle, based on limitation. It is incomplete, thus superficial and transient, as well as time-bound.
The highest Love is immutable, eternal, unchanging, perfect, generous, without conditions, Absolute, unassociated with anything the ego-mind contrives...It just is. It excludes no one and nothing, for It is our ground of Being. It is Cosmic Union, embracing all life forms. This perfect Love is heart-centered, intuitive, and boundless. It is complete, thus peaceful, naturally joyful, and spontaneous. It is our true nature.
i am Sirius