The prison that we all live in:

"When I was teaching Vipassana to the prisoners at Tihar, I told them that it is true that they are in prison. But the fact is that every individual in the entire world is in prison. We are all prisoners of our own behaviour patterns, in the prison of our own negativity. Everyone is suffering-not only those in prison, but also those in the outside world.

Often we do not know that we are in prison; we don't know that we are suffering inside. At the surface level, we may seem happy, satisfied by various distractions and sensual pleasures. In actuality, only a very small part of the mind enjoys such things. The remaining part of the mind remains full of tension and dissatisfaction all the time.

... Each morning, the light of the sun dispels the darkness of the night. It makes no difference which part of the world it is shining upon, or in which season or year; whether in the past, present or future, the darkness vanishes automatically with each sunrise. Similarly, the light of Vipassana dispels the darkness of ignorance and of misery regardless of the time or the place. All around the world today the darkness of suffering is painfully apparent. People everywhere are eager to find an answer to the misery in their lives. Thus it is no wonder that the light of Vipassana--the light of wisdom--has proven itself of such relevance to the modern world."

-SN Goenkaji
http://www.vridhamma.org/Opening-Talk-94-Seminar