This question troubles 25-year-old IIM graduate Anveshak Jigyanshu, an investment banker in Singapore, as he meets his two-decade senior Charan Saket. Their conversation reminds the reader of the dialogue between Arjuna and Krishna. Anveshak, a self-proclaimed atheist, is mesmerized by the compelling arguments put forth by Charan as they both explore the world of science and its limitations, what proof means, the dilemma of ethics and finally, what...