You don't need a lot of brains to succeed - a hard head can open many doors that being smart can't. The world is full of knuckleheads. You're better off not realizing you may be one of them. Being hit on the head with a hammer isn't funny - unless it happens to someone else. Then, it's really funny.
Enthusiasm sometimes counts for more than skill.
Remember, you don't have to be smart to lead other people, just marginally smarter. Never doubt your own abilities, even when all the evidence is to the contrary. Painting someone's tongue black will be remembered longer than a witty comeback. Even rich society women enjoy a good pie fight. Dental care is unnecessary, as long as you have a doorknob and a length of string.