I was aware of Sun Tzu’s quote, Peter, that’s why I went through the trouble of saying “in the form we know it”. Note that Mingshey asks about the quote “divide and conquer”, not the quote “so the rule for use of the military […]”. I’m sure that many a Chinese sage wrote proverbs about thought and existence many thousands of years ago, and yet if someone mentions “cogito ergo sum” one should point to Descartes.