Is there a famous quote that goes something like this (see below)?

yes totally its true and u dont need to search the net to see whether it exsists or not to me it does and it doesnt have to be exact as the original quote you have put it in ur own words whitch is good all you gotta do is belive it now as long as you know what it means then good but if u want to tel everyone then go ahead it might teach a few lessons and help people out in there life i know it may only be a quote but there is one quote that has helped me out and that is you dont know what you have got ... till its gone and when its gone you can never get it back !

try thinkexist.com. I'm not sure, but i think that is a website dedicated to quotes from different people. I could be wrong, but I suppose there's no harm in trying.

i m not sure, but i think Confucius may of said something like that.