Bliss is the essence of manifesting what you need in your life, not want. Suffering, is the essence of earning treasures in the heavenly realms, not on Earth.
Serenity is the essence of attaining a silence in body, mind and spirit selves so that the outside world doesn't come crashing in on your personal privacy. Spiritual growth occurs in many different ways, mostly through endurance, patience, accepting the things we cannot change, but to help others with our story, and to remember those who have walked in many other kinds of moccasins, in the game of life.