Intelligent or not, we all make mistakes and perhaps the intelligent mistakes are the worst, because so much careful thought has gone into them. Peter Ustinov
I am bound to take careful thought concerning the consequences of every word and deed. When, however, the Future has become the Past, it would be the merest vanity for me to grieve or to repent over that which was decreed by universal Law. Richard Francis Burton
Certainly we tend to be resistant to change, on the whole, but that is because we have learned the hard way that change for its own sake is not a good idea, and that if something works more or less satisfactorily, it is best not to alter it without long and careful thought. George MacDonald Fraser