Geometry is beautifully logical, and it teaches you how to think and prove that things are so, step by step by step. Proofs are excellent lessons in reasoning. Without logic and reasoning, you are dependent on jumping to conclusions or - worse - having empty opinions.

I've never found an interesting person with a foul mouth.

Be able to sneeze without sounding ridiculous. That means neither stifling yourself or spraying your immediate vicinity.

Avoid using cigarettes, alcohol, and drugs as alternatives to being an interesting person.

The length of your education is less important than its breadth, and the length of your life is less important than its depth.

Be able to correctly pronounce the words you would like to speak and have excellent spoken grammar.

The difference between America and England is that the English think 100 miles is a long distance and the Americans think 100 years is a long time. The difference between an autobiography and an unauthorized biography is like the difference between an account of your life written by your mother and one written by your mother-in-law.