"As Kane tells it, the pre-teen Bruce is out at night (circa 1924) with his parents when an armed mugger kills both of them. The orphaned lad, his hands clasped in prayer, his bedroom illuminated by a single candle, swears 'to avenge their deaths by spending the rest of my life warring on all criminals'. He 'becomes a master scientist' and 'trains his body to physical perfection' and, because 'criminals are a superstitious cowardly lot', chooses to become 'a creature of the night, black, terrible... a bat... the Batman'. From these two garishly printed pages, Nolan and Goyer have fashioned a whole movie."
January 1, 1970
https://en.wikiquote.org/wiki/Batman