Without reflection, we go blindly on our way, creating more unintended consequences, and failing to achieve anything useful.
It sometimes seems to me that the whole course of English history was one of accident, confusion, chance and unintended consequences - there's no real pattern.
If there is one lesson for U.S. foreign policy from the past 10 years, it is surely that military intervention can seem simple but is in fact a complex affair with the potential for unintended consequences.
I think it's brought the world a lot closer together, and will continue to do that. There are downsides to everything; there are unintended consequences to everything. The most corrosive piece of technology that I've ever seen is called television - but then, again, television, at its best, is magnificent.
Good intentions can often lead to unintended consequences. It is hard to imagine a law intended for the workforce known to Henry Ford can serve the needs of a workplace shaped by the innovations of Bill Gates.
The law of unintended consequences pushes us ceaselessly through the years, permitting no pause for perspective.
Politics is tricky; it cuts both ways. Every time you make a choice, it has unintended consequences.
I hope I'm wrong, but I am afraid that Iraq is going to turn out to be the greatest disaster in American foreign policy - worse than Vietnam, not in the number who died, but in terms of its unintended consequences and its reverberation throughout the region.
Clearly there are always unintended consequences of any legislative or regulatory act that's taken in the heat of battle.
The reason I am so negative about the Federal Reserve's policies is that they only target core inflation and argue that they can't identify bubbles, but when each bubble bursts, they flood the system with liquidity that brings about unintended consequences.