This quote by Charlie Kaufman suggests that our identity is figured out by what we love, not by what loves us. This suggests that we should focus on our own enthusiasms and interests, instead of trying to please others. It encourages us to be true to ourselves and to pursue our own dreams, rather than attempting to fit into somebody else's idea of who we ought to be. It likewise recommends that we ought to not be specified by our relationships, however rather by our own private passions and interests. Eventually, this quote encourages us to be authentic and to follow our own courses, rather than attempting to comply with another person's expectations.
