La vérité, Boris Cyrulnik [The truth To find happiness, you have to risk misfortune. If you want to be happy, we must not seek to flee misfortune at all costs. We should rather investigate how - and thanks to that - we can overcome it.
Nah in most cultures means "No". In my culture, it means an assuring "Here, take it from me". Only family and close friends use it with each other. With a change of tone, it could also mean a dismissive "That that, sucker!" to a rude person.