A person who talks when you wish him to listen. Who's knowledge grew lesser and lesser. And now he's a College Professor. If there is only one way to spell a name, you will spell it wrong, anyway. Anything free is worth what you pay for it.
Friends come and go, but enemies accumulate.
A mathematician is a machine for converting coffee into theorems. If you're not very clever you should be conciliatory. When things just can't possibly get any worse, they will. One way to stop a runaway horse is to bet on him. Conceit causes more conversation than wit.