If you define your rival by his momentary weakness, you fail to measure the strength he builds while you are congratulating yourself.

The prince who mistakes a rival's temporary caution for permanent weakness will find his own arms insufficient when that rival chooses to test them.

Does the man who returns to the same river believe the water he steps in now is the water he stepped in before?

A true hypothesis predicts new phenomena, not the comforting return of old ones; the rival's growth was the prediction we ignored.

The physician who diagnoses the same patient with the same disease a decade later, without noting the metastasis, is guilty of malpractice.

One cannot solve for the present position of a moving body by using only its coordinates from a decade past.