As i watch i see the world pass me by.
all the good, the bad, in the twinkle of an eye.
i watch and wait, and patiently sit.
i never began, so i shall never quit.
my only presence is in my being.
it is hardly noticed, and not worth a thing.
i'm fast as light, thin as air.
run if you can. run if you dare.
to avoid me is the mark of a fool.
for all you're worth, your life is my tool.
though concealed, i am not shy.
the question is: what am i?
ans. time!!