a nastik will not hold dialogue or fight with god. even i underwent this phase. when my dad was hospitialized i was very sure that he'll come out of it as i believed in my god. i thought my god will not allow this to happen. so when he died, i was so disheartened and angry with my god that i stopped praying for almost a year. but i felt a emptiness within me and finally i went back to my god n praying. i realized i needed to understand d working of greater being and sometimes it s not possible for god to fulfill all prayers. a few years later my mom suddenly died (unlike me dad who was hospitalised, my mom' s death was too sudden) i didnt evn have the time to pray or fight with god. everything was over within an hour. by now i was used to d working of god or fate or whatever. today i may not pray to god for everything (i used to earlier) but i need my god. but my dad's death changed my belief in god. i mean i grew up!!! i still believe in god but it is tempered by my belief in fate. whatever has to happen it will happen. (hindu philosophy!)
d reason i gave personal example, is that RK is definitely not a nastik. he just needs an external push towards his god. he has waited for it.