Spam I didn't mind.

To realize the value of a sibling,
Ask an only child.

To realize the value of ten years,
Ask a newly divorced couple.

To realize the value of four years,
Ask a graduate.

To realize the value of one year,
Ask a kid who just failed a final exam.

To realize the value of nine months,
Ask a mother who just gave birth to a stillborn.

To realize the value of one month,
Ask a mother who just gave birth to a premature baby.

To realize the value of one week,
Ask an editor of a weekly newspaper.

To realize the value of one minute,
Ask a person who just missed the train.

To realize the value of one-second,
Ask a person who just avoided a twenty car pile-up.

To realize the value of a friend,
LOSE ONE.