We take time for granted.
When we are small we can hardly wait to get older. We hate when people say that we are too young to understand something. Days drag and we celebrate our birthdays loving the passage of time. We cannot wait for the next one.
When we get older, the time slows down. We notice the passage now. People we know and love start to leave us. We realise that your body gets older. "I'm not as young as I used to be" we say sometimes.
Still we postpone doing things. There is never a good time to realise some of our dreams. We know that the clock is ticking but we still delude ourselves that we have plenty of time, that we will live forever.
And then we find out that we are sick, terminally sick. And the time seems to be slipping away. And suddenly we would love to do hundreds of things we never had time to do before. But it is too late now. We have no more strength to do it, no more days.
So get up now and do it.