Seek discomfort. Go help at a homeless shelter or local food kitchen. The problem is you've insulated yourself from the reality others live in. There's a lot of good you can do when you have resources.
I don't think that's quite the advice they need. For any outcome short of dropping everything to rededicate their life to charity full time, the author will still have all the same questions about direction and priorities in their professional life.
I can share from my own experience (and from talking with the friends I've made along the way) dedicating your time and resources to charity volunteering is a fulfilling force, but never ultimately so. It doesn't stop whatever is really gnawing on your soul about direction in life. Those things have to be understood and addressed directly.
I agree. See the first line: "Seek Discomfort". The the first step. There wasn't an implication that this was going to solve his problems, it's that the first step is popping the bubble you live in.
"The Bible is meant to comfort the afflicted and afflict the comfortable"
-Martin Marty