He speculated that the river Pishon represents prudence, the river Gihon is the symbol of sobriety, the Tigris symbolizes fortitude, and the Euphrates denotes justice.
Ia berspekulasi bahwa Sungai Pisyon melambangkan kearifan, Sungai Gihon adalah lambang keseriusan, Tigris melambangkan ketabahan, dan Sungai Efrat mengartikan keadilan.