Give me a productive error over a boring, mundane and unproductive fact any day.

The proper method for hastening the decay of error is ... by teaching every man to think for himself.

It takes less time to do a thing right than it does to explain why you did it wrong.

If I have erred, I err in company with Abraham Lincoln.

Trial and error are usually the prime means of solving life’s problems. Yet many people are afraid to undertake the trial because they’re too afraid of experiencing the mistake. They make the mistake of believing that all error is wrong and harmful, when most of it is both helpful and necessary.

There's very little room for error.