Not really a quote but an exchange from Reddit, has really struck a cord with me on the dangers of not executing a plan perfectly.
"If coal turns to diamonds through pressure, could we dump a bunch of coal on the ocean floor to turn them into diamonds faster?"
"Nope, it's nowhere near enough pressure. The pressure at the bottom of the mariana trench is nearly 16,000 psi. The pressure required to make diamonds the natural way? 750,000 psi.
You'd have wet coal."