You can never know everything, and part of what you know is always wrong. A portion of wisdom lies in knowing that. A portion of courage lies in going on anyway.
Take what you want, and pay for it.
In wars, boy, fools kill other fools for foolish causes
Run when you have to, fight when you must, rest when you can.
At my age, if I make it up, it's still an old saying.
Beauty holds more worth than gold.