Can you answer this riddle?

Question

I never was, am always to be,
None ever saw me, nor ever will,
And yet I am the confidence of all
Who live and breathe on this terrestrial ball.

No fair..that was too easy...I'm adding more. :p
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1.) I am the black child of a white father;
A wingless bird, flying even to the clouds of heaven.
I give birth to tears of mourning in pupils that meet me,
and at once on my birth I am dissolved into air.

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2.)I wander over hairy mountains,
Where I pursue a monster, dreaded by humans.
It is in the young brushwood that I hunt the most,
And often I inflict a frightful carnage
On those cruel monsters, slaughtered under my teeth
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3.) What we caught we threw away;
what we didn't catch, we kept.
What was it?
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4.) My sides are firmly lac'd about,
Yet nothing is within;
You'll think my head is strange indeed,
Being nothing else but skin.

Answer 1

The answer is Tomorrow

Answer 2

Yes, I just don't feel like it

Answer 3

Oh, my God!