Two wrongs are only the beginning. If at first you don't succeed, destroy all evidence that you tried. Success always occurs in private, and failure in full view. Be sure to change the messages, if you want. This example will appear in our forthcoming book on JavaScript.
Nothing is as easy as it looks.
Everything takes longer than you think. Anything that can go wrong will go wrong. If there is a possibility of several things going wrong, the one that will cause the most damage will be the one to go wrong. If there is a worse time for something to go wrong, it will happen then. If anything simply cannot go wrong, it will anyway.