Read it through once

Who taught the shepherd-girl to do these marvels—she who could not read, and had had no opportunity to study the complex arts of war? I do not know any way to solve such a baffling riddle as that, there being no precedent for it, nothing in history to compare it with and examine it by. For in history there is no great general, however gifted, who arrived at success otherwise than through able teaching and hard study and some experience. It is a riddle which will never be guessed. I think these vast powers and capacities were born in her, and that she applied them by an intuition which could not err.