Magic squares, discovered by Pythagoras, are of complex shapes with a fundamental esoteric value of establishing ties between the sacred numbers, revealing the mysterious alchemy.
But there is a magic square made up of letters. This square is very important in esoteric symbolism, it forms the Latin phrase:
SATOR AREPO TENET OPERA ROTAS.
"The sower in his chariot wheels directs with care." Attractive companion note the cross inside the square formed by the word TENET, or "rules," generally interpreted as the cross that rules the world.