If the earth you stood on has fallen ...
Let the sky, the stars be your guide.
Let universal laws and timeless fundamentals be your unerring guide now.
- When Stalin's Russia and Hitler's Germany allied during World War 2, the world despaired.
Except Churchill, who got guidance and reassurance from History.
He pointed out that such unholy alliances usually do not last long.
- A Ninja manual suggests that you base your calculations on fundamentals.
For instance, your enemy can change their colors and formations easily.
But not the landscape or their population size or economy.
- In Physics, they call this "working from first principles."