More than fantasy or even science fiction Ray Bradbury wrote horror and like so many great horror writers he was himself utterly without fear of anything. He wasn't afraid of looking uncool - he wasn't scared to openly love innocence or to be optimistic or to write sentimentally when he felt that way.
Never cut a tree down in the wintertime. Never make a negative decision in the low time. Never make your most important decisions when you are in your worst moods. Wait. Be patient. The storm will pass. The spring will come.