Oscar Wilde said that if you know what you want to be, then you inevitably become it - that is your punishment, but if you never know, then you can be anything. There is a truth to that. We are not nouns, we are verbs. I am not a thing - an actor, a writer - I am a person who does things - I write, I act - and I never know what I am going to do next. I think you can be imprisoned if you think of yourself as a noun.
Peace requires us to surrender our illusions of control. We can love and care for others but we cannot possess our children, lovers, family, or friends. We can assist them, pray for them, and wish them well, yet in the end their happiness and suffering depend on their thoughts and actions, not on our wishes.