I talk a lot about narcissism, let's just look at some.
A soul mate is a mirror! Think about that for a moment. Imagine your best friend telling you they really love you and then explaining what they love about you in those terms—not as a person who has a separate existence of your own but to reflect them. Every single quality that meme tells you to look for in a soul mate is about what they can do for you.
Forget about Elizabeth Gilbert for a moment and think instead about the person who created that meme. For that quote comes from a larger context and it may seem less damning in context. Or it could be worse. I don't know. All I know is that the person who selected this bit read this intense self-centredness and it struck them as beautiful and inspiring. And thousands of others reacted that same way and shared it. A whole lot of people look at that utterly selfish, manipulative sentiment and nothing at all about it troubles them. I think that is scary. How about you?