Images and fantasies of our future self, believe that we should be or even fear to be; is the driver for change. All with different baggage stemming from self, family or spouse.
However the most important thing is get out of our head. To ACT.
As with this article, almost everyone who's trying to figure out the next career takes a long time to try and figure out the next career. Under normal circumstances, career transition takes 3 years and rarely linear. A few steps forward, then back.
Craft experiments. Shift connections. Make sense of the changes.
We all have our epiphany. I recognised mine as the 19 hours flight back from Boston (the plane which broke down and I had to stay over at Chicago for 24 hours). On the plane back to Singapore, I first sat beside a guy who's almost finishing his grad school, and then later, after transiting at Hong Kong, I sat beside a professor from UC Berkeley.
Everything takes time, perseverance and hard work. But pray, do start. Start by taking action on the road to Damascus.