You all say that you want freedom, and yet you keep attaching to what is around you.

In order to be free, you have to release your attachments. You do not have to give all your worldly possessions away, but you must release their hold on you.

Free means to not be bound.

In order for you not to be bound, you release all that you have been bound to. Of course, you have not really been bound. You just thought so, and that has been enough to keep you bound. Binding is mental.

Even surrounded by prison walls, you are free.

Even in a prison, you can let go of attachments.