Apne man mein dhoob ker pa ja tu raz e zindighi Tu aghar mera nahin banta na ban, apna to banIqbal's ashars are ones that seem very pertinent and applicable in so many instances; another that I am (unfortunately) always reminded of is:
Majid tau banadi shaab-bhar mein imaan ke hararrat walon nay mun apna tau purna paapi hai, barsoon mein namazi ho na saka