All of a sudden, space isn't friendly. All of a sudden, it's a place where people can die. . . . Many more people are going to die. But we can't explore space if the requirement is that there be no casualties; we can't do anything if the requirement is that there be no casualties.
Isaac AsimovHaving no unusual coincidence is far more unusual than any coincidence could possibly be.
Isaac AsimovWhen asked for advice by beginners. Know your ending, I say, or the river of your story may finally sink into the desert sands and never reach the sea.
Isaac Asimov