To realize the value of one year: Ask a student who has fail

To realize the value of one year: Ask a student who has failed a final exam.

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 hour: Ask the lovers who are waiting to meet.
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.

To realize the value of one millisecond: Ask the person who has won a silver medal in the Olympics