The Society's emblem is a pentagon with the letters Phi Sigma Tau at the center. Each of the angles contains a word representing one of the five streams of world thought: Chinese, Indian, Islamic, Hebrew, and Greek.
The seal of the Society is the reverse side of the Athenian Silver Tetradrachma (B.C. 480-400), which bears the owl, olive spray, and small crescent. The margin of the seal carries the legend, Phi Sigma Tau, 1930.