Firstly, I have not read Erin's post. However, the concept you mention is also familiar to me through Stephen Covey's writing.
To have 'Found Your Voice', as Covey puts it, you would be able to answer the following questions with a resounding ... yes.
With regard to your job/work/life ....
1. Is it satisfying your bodily needs - food, water, shelter etc? (Body)
2. Is it stimulating your creativity/feeding your mind? (Mind)
3. Do you LOVE it? (Heart)
4. Is it the right thing for you to be doing? (Spirit)
It is a simple little model, but nonetheless it is profound for all that.