Hard poems riddles with simple answers

What does man love more than life, Fear more than death or mortal strife. What the poor have, the rich require, and what contented men desire. What the miser spends and the spendthrift saves, And all men carry to their graves?

Die without me, Never thank me. Walk right through me, Never feel me. Always watching, Never speaking. Always lurking, Never seen.

It caused the destruction of Troy, The worst of tragedies, And numerous maladies, Yet it is chased, desired and fought for. What is it?

Alive without breath, As cold as death; Never thirsty, ever drinking, All in mail never clinking.

The front of me is the source of a song Or to kiss with a fervor of love lifelong. My back is a plant fit for a queen, Crafted by needle, chemical, or machine.

Poke your fingers in my eyes and I will open wide my jaws. Linen cloth, quills, or paper, I will devour them all. What am I?