Miyamoto Musashi - 1643 "The Nine Ways of Strategy"

One must be - then two - then three.

The Nine Ways of Strategy - 1643 - Musashi

1. Do not think dishonestly
2. The way is in training
3. Become acquainted with the arts
4. Know the ways of all professions
5. Distinguish between true gain and loss
6. Develop intuitive judgement
7. Perceive things not seen
8. Pay attention - even to trifles
9. Do nothing which is of no use

There you have it...