A small block shows the Devanagari symbol of the absolute; when turned 90° to either the right or left, it reveals the latin spelling "OM"
"The goal which all the Vedas declare, which all austerities aim at, and which men desire when they lead the life of continence … is Om. This syllable Om is indeed Brahman. Whosoever knows this syllable obtains all that he desires. This is the best support; this is the highest support. Whosoever knows this support is adored in the world of Brahma."
~ Katha Upanishad I