It is hard to go about your daily life without knowing your purpose because that way, you would not know how to move and react to certain events and situations.
So, I suggest that you find what you really are geared for in life. I mean, if you have passion for teaching, be a teacher. It is not always about getting the big bucks for whatever you do as long as you are happy.
That has been a common misconception about working, really. And it is starting to feel like people are living to earn money.
