Your mission in life is to have a "why" to live for, to use your best qualities in the service of the kind of world in which you would like to live. That is your purpose. This is what life expects of you. And when you live according to your purpose, setting goals that support it, you may find the pieces of your life drawn together into a strong internal whole. Then, no matter how difficult life's experiences may prove to be, you can be able to endure and even prevail.