Older people, who just happen to have been around longer, may not be cleverer than the young, but they have seen more.
If you've become a huge act and you're still doing the same music you wrote with your friends when you were making zero dollars, you're lazy.
It is commonly said that men are forward to believe whatever is connected with their own interest. This in common cases is true; but it is also true, that when some very great and unexpected good news is brought to us, we find it very difficult to credit it.