You don't have to know what you want and you don't have to be passionate about anything. You did not ask for this life so noone can expect anything out of you. You are free to live your life as you want with or without any goals.

As human beings we want to believe in the greatness of life. How to mould our life. What to get out of life. The more you get entangled in want and more want, you will never feel satisfied. Mental satisfaction is achieved when you don't want anything and accept what comes to you.