A POETIC INQUIRY

So I've decided I don't like my previous big question so I thought of another.
What is time and why do I need it? Why does time fly by so fast.
People say time flies by when you're having fun but time always goes by fast in certain classes and I'm not having any fun at all.
Okay maybe that was more than one question but that's my brand new BIG QUESTION.
AND HERE IS THE SONNET I PICKED OUT.

On the Shortness of Time

By: Wilfred Scawan Blunt

If I could live without the thought of death,

Forgetful of Time's waste, the soul's decay,

I would not ask for other joy than breath,

With light and sound of birds and the sun's ray.

I could sit on untroubled day by day

Watching the grass grow, and the wild flowers range

From blue to yellow and from red to grey

In natural sequence as the seasons change.

I could afford to wait, but for the hurt

Of this dull tick of time which chides my ear.

But now I dare not sit with loins ungirt

And staff unlifted, for death stands too near.

I must be up and doing--ay, each minute.

The grave gives time for rest when we are in it.