You have seen so much of the outer world and had so many experiences of people, places, and things—and of course those experiences will keep coming. But now, in the second half of your life, as the outer world seems more unstable and dangerous than ever, we want you to take the same rapacious curiosity that once thrust you all over the planet with a hungry, fascinated appetite, and we want you to turn it inward.
There are great treasures in the soul: there's faith and love, there's awe and wisdom. All these things you can dig — but if you don't know where to dig, you dig up mud. If you want to get to the gold — awe before God, and the silver — the love, and the diamonds — the faith, then you have to find the geologist of the soul who tells you where to dig. But the digging you have to do yourself.