Give naught, get same. Give much, get same.
It's always worthwhile to make others aware of their worth.
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.
It's much more profitable to sell investing advice than to follow it.
Accepting blame when it's not really due sometimes makes the point better.
Making mistakes is human ... repeating 'em is too.