Sayid: I can't stay here.
Sayid: I'm leaving. I don't know for how long.
Kate: Sayid, you can't. We still don't know what's out there.
Sayid: I've worse things to fear than what's in the jungle. What I did today - what I almost did - I swore to do never again. If I can't keep that promise, I have no right to be here.
Kate: There's nowhere to go.
Sayid: Someone has to walk the shore and map the island. And see what else there is. I can't think of anyone better to do it than the only one I trust. I hope we meet again.