What is Time?

What is time?
Was the creation of time designed to show the fragility of mortal man and to bring hope to a fallen world? 
If suffering starts then it must also end when it's time is up.
Even the laws of creation are governed by the limits of time. The heavenly bodies run their course and return back to where they came from, knowing their cycles must be completed within the confinement of time.
The kernel of wheat must sprout and break forth or be the victim of time.
The reaper must harvest his crop with earnest or be the victim of time.
The fruit tree must put forth her buds or be the victim of time.
The beasts of the field must bare their young in season or they too will become victims of time.
Man too, must learn to number his days wisely or the progression of time may well become his final enemy.
The man who masters the creation of time will surely know when the hour of his salvation has come.