Knowing what you want is important-really important.
Until you nail what you want, all of the meetings, all of the training, all of the long hours, all of the self-convincing will be an absolute waste of time. And you don't have time to waste. Don't be lulled into a false sense of security by your paycheck, retirement account or the applause of the audience.
The ditches are full of people that could never committ to what they really wanted.