"Why make yourself miserable saying things like, "Why do we have such bad luck? What has God done to us? What have we done to deserve this?" - all of… - Richard Feynman

It appears that there are enormous differences of opinion as to the probability of a failure with loss of vehicle and of human life. The estimates range from roughly 1 in 100 to 1 in 100,000. The higher figures come from the working engineers, and the very low figures from management. What are the causes and consequences of this lack of agreement? Since 1 part in 100,000 would imply that one could put a Shuttle up each day for 300 years expecting to lose only one, we could properly ask "What is the cause of management's fantastic faith in the machinery?" We have also found that certification criteria used in Flight Readiness Reviews often develop a gradually decreasing strictness. The argument that the same risk was flown before without failure is often accepted as an argument for the safety of accepting it again. Because of this, obvious weaknesses are accepted again and again, sometimes without a sufficiently serious attempt to remedy them, or to delay a flight because of their continued presence.

The most important thing I found out from [my father] is that if you asked any question and pursued it deeply enough, then at the end there was a glorious discovery of a general and beautiful kind.

And then there's a kind of saying that you don't understand it, meaning "I don't believe it. It's too crazy. It's the kind of thing, I'm just... I'm not going to accept it."... This kind, I hope you'll come along with me, and you'll have to accept it, because it's the way nature works. If you want to know the way nature works... We looked at it, carefully... That's the way it looks! You don't like it? Go somewhere else... to another universe where the rules are simpler, philosophically more pleasing, more psychologically easy. I can't help it! OK? If I'm going to tell you honestly what the world looks like to... human beings who have struggled as hard as they can to understand it, I can only tell you what it looks like, and I cannot make it innocent. ...I'm not going to simplify it, eh? I'm not going to fake it. I'm not going to... tell you it's something like a ball bearing on a spring. It isn't.