All work and no play makes Jack a dull boy - and Jill a wealthy widow.
A special skill, like speaking several languages, or keeping your mouth shut in one.
The lecturer who is full of his subject is usually very slow in emptying himself.
Egotist: 1. A person who is his own best friend. 2. An I specialist. 3. A man whose opinions all change, except the one he has of himself.
An instrument that sometimes expresses thought, sometimes obscures thought, but most often replaces thought.
Somebody is always doing something that somebody else said couldn't be done.