Explain what jobs means when he says death is the single best invention in life

The death with life are connected, we can think of death as a period of time, if we waste our life, we will arrive until death without any Goal achieved.

We must take advantage of our life, but we must work thinking about the present as a gift.

Death pushes us to be something in life, For example:

If the death didn't exist, we would leave everything for tomorrow, and always happen, even we know that the time is gold.