Many people do know perfectly what they don't want in life... They don't want their current boring job anymore, nor the nasty manager/superior they currently have. They don't want to stress over their finances.
On the other hand, most people don’t really know where they want to go. Or a faint idea, but not clear and specific!
Try this meditation exercise, put on some relaxing music, and put yourself in a comfortable position with no distractions.
Close your eyes and focus on 1 thing: try to visualize the destination you want to reach in your professional life.
Where do you want to go in your professional life?
Imagine yourself one year from now and looking back.
Ask yourself; what actions did you take, what decision did you make to achieve where you will be in one year's time?
How does that future vision make you feel?