Ristriction can be liberating in the life of Pi because his ristriction in the life boat teaches Pi that with every ristriction there is also an expansion. For example when Pi is ristricted on the life boat with Richard Parker he come up with some very creative ways of avoiding the tiger, and eventually teaching Richard Parker that he is the super alfa by makeing loud nouse. Also the fact that Pi starts out on the life boat very religous and when he ends he is not so religous.