Time is very short. The scarcity of any commodity makes it worth all the more the more scarce it is. This is especially true if the commodity is one without which life is no longer possible.
Time is very short and very precious.
Time is so short, and the work that we have to do in time is so great, that we have no time to spare. Our work is to prepare for eternity. This must be done in time, or it will never be done. Time is precious because we are uncertain of its continuance. We all know that our time is very short, but we do not know how short.