Diamonds are made under pressure.

 
There are times that you feel you have so much work to do, you have lack of sleep and rest, you press on because you know what you want and you want to achieve what you aim. You must go on because however hard things are, there is also ease -- God has promised that with hardship, there is ease.. Inna ma'al 'usri yusra. So you must never never never give up.
And you must remember, whatever happen, JUST DOn't quIT.