"People think a soul mate is a perfect fit, and that's what everyone wants. But a true soul mate is a mirror, the person that shows you everything that's holding you back, the person who brings you to your own attention so you can change your life. A true soul mate is probably the most important person you'll ever meet, because they tear down your walls and smack you awake. But to live with a soul mate forever? Nah. Too painful. Soul mates, they come into your life just to reveal another layer of yourself to you, and then they leave. Thank god for it."
Richard from Texas to Liz in Eat Pray Love.
PS: I found the book frivolous and poorly written. It made me do the unthinkable. Leave a book half-read. The above insight, however, seemed so simple and correct.