Here are a couple of quotes from the novel about freedom & confinement...
*Barrabás arrived on a Holy Thursday. He was in a despicable cage, caked with his own excrement and urine, and had the lost look of a hapless, utterly defenseless prisoner; but the regal carriage of his head and the size of his frame bespoke the legendary giant he would become. (1.1)
*It bothered her to have to stay locked up within these walls that stank of medicine and age, to be kept awake at night by the moans of her sick mother, always attentive to the clock so as to administer each dose at the proper time, bored, tired, and unhappy while her brother had no taste of such obligations. Before him lay a destiny that was bright, free, and full of promise. He could marry, have children, know what love was. (2.8)
*These visits to the zoo holding on to the hand of some conceited spendthrift suitor gave her a lifelong horror of enclosures, walls, cages, and isolation. (9.29)
*He struggled and shouted so much that they loosened his bonds and helped him to his feet, but when he attempted to leave he saw that the windows had been bricked in from outside and that the door was locked. They tried to explain to him that things had changed and that he was no longer the patrón, but he refused to listen. (12.54)
I hope this helps :)