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.
Tema arutluse kohaselt kujutab Piisoni jõgi tarkust, Giihoni jõgi mõõdukust, Hiddekel [Tigris] vaprust ja Frat [Eufrat] õiglust.