What's an expert? I read somewhere, that the more a man knows, the more he knows, he doesn't know. So I suppose one definition of an expert would be someone who doesn't admit out loud that he knows enough about a subject to know he doesn't really know how much.
For some of us it seems like yesterday when Ike was in the White House, the U.S. Senate censured Joe McCarthy, and the Supreme Court unanimously ruled that racial segregation in public school was unconstitutional.
As you get older there shouldn't be anything you won't try. The payoff is that you open up whole new avenues that are fun. It's a misinterpretation of life to live it only in preparation for the next one. To subordinate the one you've got to an indefinite next round is foolish. It's a waste of this life not to live this life. What's next is anybody's guess.
When one seeks assurance, there's none from those who respond, Now, don't you worry about a thing. If you weren't worried, you wouldn't have asked. If you are concerned, it's nice to know that those you query are, too. I'll take a worrier any day over a platitudinous reassurer.