yep, that's stolen.
that's from his book, "The Prophet" which i own and am holding in front of me right now.
hmmm, nope it doesn't say it's free to be reproduced anywhere, in fact it says...
Copyright 1923 by Kahlil Gibran
Renewal Copyright 1951 by Administrators C.T.A. of Kahlil Gibran Estate, and Mary G. Gibran.
All rights reserved under International and Pan-American Copyright Conventions.