To err is human, to persist is diabolical.
The original latin: Errare humanum est, sed perseverare diabolicum.
Persuade me or prove to me that I am mistaken in thought or deed, and I will gladly change - for it is the truth I seek, and the truth never harmed anyone. Harm comes from persisting in error and clinging to ignorance.
It has not been unknown that judges persist in error to avoid giving the appearance of weakness and vacillation.
Any man can make a mistake; only a fool keeps making the same one.
I have learned all kinds of things from my many mistakes. The one thing I never learn to stop making them.
There are minds constructed like the eyes of certain insects, which discern, with admirable distinctness, the most delicate lineaments and finest veins of the leaf which bears them, but are totally unable to take in the ensemble of the plant or shrub. When error has effected an entrance into such minds, it remains there impregnable, because no general view assists them in throwing off the chance impression of the moment.
There is a construct in computer programming called 'the infinite loop' which enables a computer to do what no other physical machine can do - to operate in perpetuity without tiring. In the same way it doesn't know exhaustion, it doesn't know when it's wrong and it can keep doing the wrong thing over and over without tiring.
Any man can make mistakes, but only an idiot persists in his error.
What then in the last resort are the truths of mankind? They are the irrefutable errors of mankind.
Nothing is more damaging to the truth than an old error.
We have the best mathematical economic models in the world, and just because our models have been wrong for 14 straight quarters does not mean that they will be wrong in the 15th quarter.
Now, one can often get away with playing music by ear when it is not being recorded, but writing is another matter; its mistakes are not forgotten because they are still there to confuse us.
The idea that when you correct a fact, you erase that fact from people's memories is the reverse of the truth. When you correct a fact, what you do is you further lodge that fact into people's minds, and they remember the error.
To err is human, but to persist in the mistake is ugly.