Why did they feel lost to begin with? What about themselves did they lose? An Identity? Sounds about right. But is it a matter of finding yourself, or remaking yourself? I don't think we come prepackaged with certain traits like some computer you brought off Ebay. We say that life is about discovering who you are, but I don't think it's some precious gem embedded in your brains someplace. I think the feeling of drifting, without any control over the direction you float; it's not about finding yourself, it's about transforming yourself into what you secretly want and need to be.
The root of all this? Discontent. The feeling that something doesn't fit; that the pieces of the puzzle seem forced together. In the Nature vs. Nuture argument, I guess you would have to plop me on the Nuture side. As we live, we slowly assemble ourselves with the parts we learn and gain from experience. So what are we trying to find? The pieces that fit. It's not about finding who we are, because we want "who we are" to be the ideal form of ourselves, and it probably dosen't exist yet. Want to discover yourself? Keep trying out different pieces to your puzzle; eventually some of them will fit smoothly.
What's your opinion on trying to find yourself? Is the self something innate we can actually find, or something we have to create for ourselves?