I am often thought of as being remarkably bright, and yet my brains, more often than not, are busily devising new and interesting ways of bringing my enemies to sudden, gagging, writhing, agonizing death.
The most difficult part of writing a book is not devising a plot which will captivate the reader. It's not developing characters the reader will have strong feelings for or against. It is not finding a setting which will take the reader to a place he or she as never been. It is not the research, whether in fiction or non-fiction. The most difficult task facing a writer is to find the voice in which to tell the story.
God does not play dice with the universe; He plays an ineffable game of his own devising, which might be compared, from the perspective of any of the other players, to being involved in an obscure and complex version of poker in a pitch dark room, with blank cards, for infinite stakes, with a dealer who won't tell you the rules, and who smiles all the time.