Unless we are fully aware of the contents of our minds, unfortunate moments may predominate. That's why one sees so very few happy people. Happiness is not an accident, it requires hard work. Just as happiness is an inner condition, so peace is not a sheet of paper that we sign, as if it were a United Nations treaty. If it were, everybody would be peaceful.
Peace comes about by letting go.
We need to discover where we cling the most and then work with that, whatever it may be. For some of us this is our bodies. We all have to let go of them some day. It would be a good idea to prepare for that day and enjoy the bliss of letting go now, instead of waiting until the last moment. We prepare ourselves in our practice by realizing moments of liberation.