You want a valve that doesn't leak and you try everything possible to develop one. But the real world provides you with a leaky valve. You have to determine how much leakiness you can tolerate. — Arthur Rudolph Copy Share Image
“I prefer to think about problems the way engineers do. If a valve doesn’t work, they don’t say, “Well, we must have valves, so let’s try two valves.” If a valve doesn’t work, they say, “Well, what would work?” Their… — Daniel Quinn Copy Share Image
