The value of time

Found this in an email.

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 student who has failed a final exam.

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

To realize the value of one month:
Ask a mother who has given 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 has missed the train, bus or plane.

To realize the value of one second:
Ask a person who has survived an accident.