“The path to a passionate life is often way more complex than the simple advice ‘follow your passion’ would suggest.”
You’ve been told you should follow your passion, to do what you love and the money will follow. But how sound is this advice? Cal Newport argues that it’s astonishingly wrong.

But if you do what you do with passion, it make all the difference. 

He actually mentions Strengthsfinder as a tool, but is kind of dimissive of it. The stories he tells of people living their passions, however, he speaks of lifestyle traights they are cultivated through thir job which sounds suspiciously like people using their strengths in their work.