kabhi kabhi aankhon dekha sach nahin hota

as sahir true might be right not just in arzoos case but incase of his life as well. It was only alvira and to some extent zaki who knew the truth about zeenat and sahirs relationship which seemed to be rosy outside as i guess kurti apa perceived but as said by sahir kabhi kabhi aankhon dekha sach nahin hota because in reality it wasn't so.

I thought this dialogue is for sure related to sahir's past .