Time is valuable!

to realize the value of a year, ask a student who has failed a final exam

 to realize the value of a month, ask a mother who has given birth to a premature baby

to realize the value of a week, ask an editor of a weekly newspaper 

to realize the value of an hour, ask the lovers who are waiting to meet

to realize the value of a minute, ask the person who has missed the train, bus or airplane

to realize the value of a second, ask a person who has survived an accident

to realize the value of a millisecond, ask the person who has won a silver medal in the Olympics