This great bliss is given to us without a price, like all that is best: we do not pay to sleep. We pay thousands of pounds for jewels, for gems that are of no use to our life - bread we can buy for pennies. Man does not know how great the value of sleep is, because the benefit it gives cannot be seen or touched. If he is very busy, if he has some business that brings him money, he will rather be busy in that and take from his sleep, because he sees, "I have gained so many pounds, so many shillings"; he does not see what he gains by sleep.