I don't think of love in terms of relationships. It happens in terms of seconds, but it goes away like that, too. I pass a nurse, I love her, it ends when I go around a corner; at a restaurant I see a forlorn man at the table next to me, and I love him, and the conversation pulls me back, and it's ended. A patient comes in, and she is sick, and I love her, and then she dies, and I never see her again. This is what I live for. Don't think that it's sad.
Be aware of yourself and know yourself. No matter how much you have learned and how much you know, if you don't know yourself you don't know anything.