Do not neglect the principles of foresight and know that often, puffed up with success, armies have lost the fruit of their heroism through a feeling of false security.
Frederick The GreatThe greatest and noblest pleasure which we have in this world is to discover new truths, and the next is to shake off old prejudices.
Frederick The GreatMan is made for error; it enters his mind naturally, and he discovers a few truths only with the greatest effort.
Frederick The Great