Although spoken English doesn't obey the rules of written language, a person who doesn't know the rules thoroughly is at a great disadvantage.

Be in the habit of experimenting with your clothing so that you don't get stuck for life with a self-image developed over the course of high school.

Be able to identify the most common breeds of dogs and cats on sight.

Know how to behave at a fine restaurant, which is a telltale measure of social maturity.

Know why certain foods, such as truffles, are expensive. It's not because they taste best.

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

To acquire knowledge, one must study; but to acquire wisdom, one must observe.