Like all men in Babylon I have been a proconsul; like all, a slave; I have also known omnipotence, opprobrium, jail. Look: the index finger of my right hand is missing. Look again: through this rent in my cape you can see a ruddy tatoo on my belly. It is the second symbol, Beth. This letter, on nights of full moon, gives me power over men whose mark is Ghimel; but it also subordinates me to those marked Aleph, who on moonless nights owe obedience to those marked Ghimel. In a cellar at dawn, I have severed the jugular vein of sacred bulls against a black rock. During one lunar year, I have been declared invisible: I shrieked and was not heard, I stole my bread and was not decapitated.
Jorge Luis Borges.
The full story is here.