Gitanjali: 31

“Prisoner, tell me, who was it that bound you?”
“It was my master,” said the prisoner. “I thought I could outdo
everybody in the world in wealth and power, and I amassed in my
own treasure-house the money due to my king. When sleep
overcame me I lay upon the bed that was for my lord, and on waking
up I found I was a prisoner in my own treasure-house.”
“Prisoner, tell me, who was it that wrought this unbreakable
chain?”
“It was I,” said the prisoner, “who forged this chain very carefully.
I thought my invincible power would hold the world captive leaving
me in a freedom undisturbed. Thus night and day I worked at the
chain with huge fires and cruel hard strokes. When at last the work
was done and the links were complete and unbreakable, I found that
it held me in its grip.”